Geometry

04:32
Can you solve the time travel riddle? - Dan Finkel

1 week ago / 14 views

Practice more problem-solving at https://brilliant.org/TedEd/ Solution to bonus riddle: https://brilliant.org/TedEdTimeTravel/ Your professor has accidentally stepped through a time portal in his physics lab. You’ve got just a minute to jump through befor
04:29
Can you solve the secret werewolf riddle? - Dan Finkel

1 month ago / 114 views

Practice more problem-solving at https://brilliant.org/TedEd/ Signup to receive the bonus riddle's solution: https://brilliant.org/TedEdWerewolf/ You’re on the trail of a werewolf that’s been terrorizing your town. After months of detective work, you’ve n
04:33
Fractals: The Geometry of Chaos - Christmas Lectures with Ian Stewart

3 months ago / 32 views

Using a simple set of mathematical rules, a very intricate geometry can be created in the form of fractals. The Sierpinski triangle is a famous example. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Watch the full lecture: http://www.rig
02:00
Maps, States & Borders

3 months ago / 142 views

Deane challenges Rob with a mathematical problem concerning maps, states and borders. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https:/
04:39
The mysterious isochronous curve

3 months ago / 67 views

It's a big name, but the isochronous curve deserves it. Rob shows you how to draw one easily and then how to investigate its extraordinary properties.
01:51
How to cut a pipe squarely

3 months ago / 102 views

Cutting a section of pipe or cylindrical rod is tricky - the cut goes sideways or doesn't meet itself, but Rob shows a simple way to cut a pipe squarely every time.
01:41
Measuring Volume with a Ruler

3 months ago / 249 views

Deane demonstrates a method for measuring the volume of an irregular container. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https://twitt
05:39
Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

3 months ago / 157 views

Thanks to Eric from Miami for suggesting this problem and sending a solution! The diagram shows a quadrilateral ABCD with the values for some angles and the length of AB. Can you figure out the area of ABCD? Subscribe: https://www.youtube.com/user/MindYou
14:53
THE SCUTOID: did scientists discover a new shape?

3 months ago / 89 views

Read the Nature paper for yourself: "Scutoids are a geometrical solution to three-dimensional packing of epithelia" https://www.nature.com/articles/s41467-018-05376-1 Thanks to Laura and Clara for helping me with the video! You can download Laura's model
04:22
How to Determine the Area of a Triangle Based on Coordinates of Its Vertices & Determinants

3 months ago / 79 views

How to Determine the Area of a Triangle Based on Coordinates of Its Vertices & Determinants. Part of the series: Finding and Using the Area of a Triangle. You can use the coordinates of a triangle's vertices and determines, along with a very specific rule
01:32
How to Solve for the Height of Cylinders

3 months ago / 266 views

How to Solve for the Height of Cylinders. Part of the series: Algebra Tips. Solving for the height of cylinders can be accomplished in just a few moments with the right equation. Learn how to solve for the height of cylinders with help from an experienced
01:14
How to Multiply to Get the Area of a Parallelogram

3 months ago / 294 views

How to Multiply to Get the Area of a Parallelogram. Part of the series: Perimeter, Area and Decimals. Multiplication is one way you can find the area of a parallelogram pretty easily. Multiply to get the area of a parallelogram with help from a longtime m
02:06
Types of Angles, Figures & Shapes

3 months ago / 221 views

Types of Angles, Figures & Shapes. Part of the series: Geometry Tips. many different types of angles, figures and shapes make up math in general as well as geometry. Learn about the types of angles, figures and shapes in geometry with help from a longtime
03:21
Can You Solve A Puzzle That Fooled Richard Feynman?

4 months ago / 127 views

What is the radius of the circle, in simplest terms involving a, b, and c? I read that even the great mind Richard Feynman made a mistake. Watch the video to learn the common mistake and what the correct answer is. Source Feynman story http://web.media.mi
05:48
What Is The Area? "You Should Be Able To Solve This"

4 months ago / 50 views

Thanks to Reio in Romania for emailing me this fun problem! What is the area? This puzzle was shared with the tagline "you should be able to solve this." Solution to 5th grade Chinese challenge problem https://youtu.be/OuJQaxZvlYs My blog post for this vi
09:15
5-Sided Square - Numberphile

4 months ago / 187 views

Check our sponsor The Great Courses Plus (free trial): http://ow.ly/j5cB30hIvm2 This video features Cliff Stoll. More links & stuff in full description below ↓↓↓ More Cliff Stoll videos: http://bit.ly/Cliff_Videos Buy a Klein Bottle fro
04:46
Can you solve the Mondrian squares riddle? - Gordon Hamilton

5 months ago / 113 views

Practice more problem-solving at https://brilliant.org/TedEd/ Dutch artist Piet Mondrian’s abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Gordon
06:13
Calculating the circumference of the Earth in 200 BC

6 months ago / 67 views

In one of the dopest displays of critical thinking in history, Eratosthenes estimated the circumference of the Earth. All he had was a pole, the sun, knowledge of a famous well in Egypt, and potentially money to pay someone to walk the distance between tw
02:43
The Man Teaching Math Lessons in the Sky

6 months ago / 52 views

Winfred Randolph Lowe, aka, “Randy the Kite Man,” is a retired math teacher taking geometry to new heights. For the past 20 years, Winfred has spent his free time flying kites. Now he’s combining his two favorite pastimes to teach the fundamentals of geom
02:04
Non-Euclidean Geometry of a Sphere - Christmas Lectures with Philip Morrison

7 months ago / 60 views

According to Euclidean geometry the angles of a triangle add up to 180 degrees. Philip Morrison shows an example of where this isn't true, and non-Euclidean geometry applies. Watch the full lecture: http://www.rigb.org/christmas-lectures/watch/1968/gulliv
03:24
Round Peg in a Square Hole - Numberphile

9 months ago / 88 views

Featuring Tadashi Tokieda - more Tadashi videos at: http://bit.ly/tadashi_vids More links & stuff in full description below ↓↓↓ Tadashi Tokieda is a Professor of Mathematics at Stanford University (though this was filmed when he was at Cambridge, in the U
01:38
How to Turn a Sphere Inside Out

9 months ago / 105 views

This video describes a way to invert a sphere. Simply fascinating to watch.
06:39
Pythagoras Theorem Explained - Mathemagic with Bawa

9 months ago / 98 views

http://www.youtube.com/watch?v=49_TJymgXgM - Mathemagic - (a+b)²=a²+2ab+b² - But Why? One of the elementary formula in high school mathematics, most of us know this formula. But do we actually know why? In this video Khurshed Batliwala, fon
01:20
Proof Without Words: The Circle

10 months ago / 77 views

Prove πR² using only beads and a ruler! I first saw this proof in an article by Russell Jay Hendel, Dowling College: http://bit.ly/LQlwQw minutephysics is now on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter -
06:11
Hexaflexaflakes

12 months ago / 98 views

I hope you enjoy this fun holiday craft! This video is supported by viewers like you! Thanks especially to: Caleb Wright, Albert Wenger, CHLOE, Pat Devlin, Jack Heidrick, Al3x, David Perryman, Wish Society, Carol Ghiorsi Hart, Chris Pierik, Andrea Di Biag
02:14
Visualizing the 600-Cell

1 year ago / 99 views

Mathematician/geometer Dugan Hammock of Quantum Gravity Research shows us a visualization of the 4-dimensional 600-Cell projected to 3D object (further projected, technically, to 2D on his computer screen.) The 600-Cell is a 4-dimensional shape made of 60
05:17
How many ways are there to prove the Pythagorean theorem? - Betty Fei

1 year ago / 150 views

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-many-ways-are-there-to-prove-the-pythagorean-theorem-betty-fei What do Euclid, 12-year-old Einstein, and American President James Garfield have in c
01:42
Finding height of a parallelogram

1 year ago / 139 views

Finding height of a parallelogram
01:31
Example finding area of triangle

1 year ago / 114 views

Example finding area of triangle
03:09
Triangle missing side example

1 year ago / 121 views

Triangle missing side example
03:29
Recognizing common 3D shapes

1 year ago / 141 views

Recognizing common 3D shapes
04:17
How volume changes from changing dimensions

1 year ago / 133 views

How volume changes from changing dimensions
04:35
Surface area word problem example

1 year ago / 147 views

Surface area word problem example
03:00
Partial circle area and arc length

1 year ago / 118 views

Partial circle area and arc length
04:51
Relating circumference and area

1 year ago / 137 views

Relating circumference and area
03:48
Pythagorean theorem with right triangle

1 year ago / 135 views

Pythagorean theorem with right triangle
04:00
Area of an isosceles triangle

1 year ago / 126 views

Area of an isosceles triangle
03:41
Example finding distance with Pythagorean theorem

1 year ago / 128 views

Example finding distance with Pythagorean theorem
22:41
Calculating the optimal sphere packing density: with oranges

1 year ago / 149 views

Check out the corresponding video I made with Steve Mould for his channel. https://youtu.be/O3RsDIWB7s0 Thomas Hales’s proof of the Kepler Conjecture. http://annals.math.princeton.edu/wp-content/uploads/annals-v162-n3-p01.pdf The Kepler Conjecture on wiki
12:55
Math Antics - The Pythagorean Theorem

1 year ago / 286 views

Learn more at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
Featured
13:00
The Moving Sofa Problem - Numberphile

1 year ago / 155 views

Featuring Dan Romik from UC Davis. More footage from this interview soon on Numberphile2. Dan's comprehensive page on this topic: http://bit.ly/movingsofa Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRIN
12:33
Pascal's Triangle - Numberphile

1 year ago / 137 views

Just a few fun properties of Pascal's Triangle - discussed by Casandra Monroe, undergraduate math major at Princeton University. Filmed during the MSRI-UP summer program. Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): htt
04:32
Math Word problems - Solving triangles

1 year ago / 179 views

Become an expert in solving math word problems! In this problem you will learn how to use triangles to solve the height of a building. A man steps back 50 feet which the angle to the top of the building change 15 degrees. Using this information find the h
05:04
Area of a Triangle - Fun challenging math problem

1 year ago / 267 views

Can you solve the area of a triangle given points X and Y. This is not a basic problem, but it is a fun and challenging math problem. See if you are smart enough to find the area of a triangle for yourself. My name is Chris and my passion is to teach math
03:41
Polygons Song For Kids Rap Video: Geometry Quadrilaterals Hexagons etc.

1 year ago / 273 views

Full lesson plan and more: http://numberock.com/polygons/ Description: Alan kite surfs, skateboards, bikes, dives, and explores space as he learns about Triangles, Quadrilaterals, Pentagons, Hexagons, Heptagons, Octagons, Nonagons, and Decagons. These sha
04:55
Solve the right triangle - Trigonometry Brain Teaser

1 year ago / 279 views

A square is inside of a right triangle. The length of each side of the triangle is 3-4-5. Given this information what are the dimensions of the square? Can you solve this right triangle? My name is Chris and my passion is to teach math. Learning should ne
25:57
The Brachistochrone

1 year ago / 182 views

BRAIN CANDY LIVE TICKETS: http://www.braincandylive.com/tickets Links to sources and to learn more below! MY TWITTER: http://www.twitter.com/tweetsauce MY INSTAGRAM: http://www.instagram.com/electricpants THE CURIOSITY BOX: https://www.curiositybox.com/ S
01:20
How Giant Lava Caves on Earth May Help Us Survive on Mars | National Geographic

1 year ago / 162 views

The first humans to arrive on Mars will experience life-threatening conditions including intense radiation, dust storms, and extreme temperatures. Researchers are mapping lava tubes at the Craters of the Moon National Monument in Idaho in hopes that their
05:24
Math Challenge - Shrinking Pool Problem

1 year ago / 283 views

Think you can solve this math challenge? Every time a boy jumps into the pool it shrinks by a certain amount. Thy boy jumps into the pool 3 times. You must find the original length of the pool My name is Chris and my passion is to teach math. Learning sho
01:32
Easy Puzzle - But can you solve it?

1 year ago / 168 views

Solve this puzzle by cutting the piece of wood into two pieces. Both pieces must fit exactly into the hole. Can you solve this easy puzzle? Watch the video and find out. My name is Chris and my passion is to teach math. Learning should never be a struggle
31:51
Geometry: An Interactive Journey to Mastery | The Great Courses

1 year ago / 157 views

https://www.thegreatcoursesplus.com/geometry-an-interactive-journey-to-mastery?utm_source=US_SocialMedia&utm_medium=SocialMediaEditorialYoutube&utm_campaign=138569 Like other math fields, geometry teaches us how to think. It leads students to uncover new
04:13
Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

2 years ago / 197 views

A marshmallow has the shape of a cylinder with diameter 5 and height 3. A dessert is made with 24 marshmallows: there are two stacked layers of marshmallows, and each layer has 3 rows of 4 marshmallows. The gaps between the marshmallows are filled with ch
09:11
Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

2 years ago / 206 views

Start with a unit square (a rectangle with both sides equal to 1, call it R1). Attach a rectangle of area 1 to its right side, then attach a rectangle of area 1 to its top. The border of this new shape is another rectangle, call it R2. We can repeat the p
05:57
Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

2 years ago / 366 views

This problem was given to Primary 6 (age 11-12) students in Singapore. What is the area of the shaded region in the video, which consists of the region bounded by 4 quarter circles in a 3x3 grid of squares, and each square has a side length of 4? The shad
09:03
Space-Filling Curves - Numberphile

2 years ago / 176 views

Henry Segerman shows us some 3D-printed space-filling curves, including the Hilbert Curve and Dragon Curve. Check Henry's book about 3D printing math: http://amzn.to/2cWhY3R More Henry videos: http://bit.ly/Segerman_Videos Dragon Curve videos: http://bit.
06:13
Aluminium - The Material That Changed The World

2 years ago / 161 views

Thanks to the vlogbrothers for sponsoring this video. Have been following their work for years, it feels great to be supported by my role models! Thank you to my patreon supporters: Adam Flohr, darth patron, Zoltan Gramantik, Josh Levent, Henning Basma. T
08:05
Can You Solve The Hardest Easy Geometry Problem?

2 years ago / 260 views

In the figure, what is the value of angle x? This problem is known as Langley's Adventitious Angles. It is also known as the hardest easy geometry problem because it can be solved by elementary methods but it is notoriously difficult to work out. Can you
12:36
Math Antics - Volume

2 years ago / 417 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
Featured
06:31
Proof - Sum of Measures of Angles in a Triangle are 180

2 years ago / 208 views

Proof that the sum of the measures of the angles in a triangle are 180
02:49
Ordering Triangle Sides And Angles

2 years ago / 178 views

Ordering triangle sides and angles
04:29
Mathematical Present Wrapping

2 years ago / 208 views

Mathematician Katie Steckles takes you through some mathematically satisfying ways to wrap presents using paper.
Featured
03:36
Finding Radius And Diameter From Circumference

2 years ago / 188 views

Finding radius and diameter from circumference
09:26
Informal Argument For The Area Of Circle Formula

2 years ago / 167 views

Informal argument for the area of circle formula
08:41
Proving Radius Is Perpendicular To Tangent Line

2 years ago / 167 views

Proving radius is perpendicular to tangent line
03:01
Hypotenuse Leg Congruence

2 years ago / 170 views

Hypotenuse leg congruence
03:56
Segments Tangent To Circle From Outside Point Congruent

2 years ago / 172 views

Segments tangent to circle from outside point congruent
04:37
Tangents Of Circles Exercise Examples

2 years ago / 162 views

Tangents of circles exercise examples
04:58
Example Showing Supplementary Oppositie Angles In Inscribed Quadrilateral

3 years ago / 193 views

Example showing supplementary oppositie angles in inscribed quadrilateral
03:56
Proving The Opposite Angles Of Inscribed Quadrilateral Are Supplementary

3 years ago / 262 views

Proving the opposite angles of inscribed quadrilateral are supplementary
01:35
Seeing Circle Similarity Through Translation And Dilation

3 years ago / 168 views

Seeing circle similarity through translation and dilation
01:20
Inscribed Angles Exercise Example

3 years ago / 194 views

Inscribed angles exercise example
05:27
Arc Measure

3 years ago / 171 views

Introduction to arc measure (and a comparison to arc length).
06:36
Arc Measure Example Problems

3 years ago / 187 views

Arc measure example problems
06:58
Arc Measure With Equations Examples

3 years ago / 176 views

Arc measure with equations examples
05:49
Solving For Unknown Angle

3 years ago / 153 views

Solving for unknown angle. One method using an inscribed angle intercepting a diameter of a circle.
02:10
Finding Inscribed Angle Measure

3 years ago / 176 views

Finding inscribed angle measure
06:35
Bisecting Yin And Yang - Brain Teaser

3 years ago / 230 views

Can you bisect yin and yang using a straight line? Find the solution to this brain teaser in this video. I also have a bunch of other fun brain teasers as well. Heaven and hell - Brain Teaser https://www.youtube.com/watch?v=YOgKI0HWCnA Two burning ropes -
02:18
The Volume Song For Kids: Online Education Rap, Pop & Hip-Hop

3 years ago / 233 views

Worksheets, Cloze, Quiz, and more at Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] Subscribe to Our YouTube Channel! http://goo.gl/3H3bJ6 This song makes makes it clear how to measure the volume of different things... like a robot!
02:22
Types Of Lines Song: Online Education Student Music Videos

3 years ago / 303 views

Get the Companion Worksheet Set and other Video-Linked Teaching Resources at: Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] Subscribe to Our YouTube Channel here: http://goo.gl/3H3bJ6 Learn about Parallel, Perpendicular, and Inters
Featured
01:47
Types Of Angles Song: Online Education Songs For Kids

3 years ago / 355 views

Worksheets, Cloze, Quiz, and more at Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] Stop right here: YOU have found the most fun way to learn about Right Angles, Acute Angles, and Obtuse Angles ever! SUBSCRIBE to our YouTube Channel
02:56
Capacity Song For Kids: Online Education Songs For Kids

3 years ago / 448 views

Worksheets, Cloze, Quiz, and more at Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] Capacity's Not Exactly Volume. Learn why, here! There's more where this came from! http://goo.gl/3H3bJ6 LYRICS: ____________________________________
02:05
3D SHAPES SONG: Online Education Shape Songs Collection

3 years ago / 343 views

Get the Companion Worksheet Set and other Video-Linked Teaching Resources at: Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] SUBSCRIBE TO OUR YOUTUBE CHANNEL: http://goo.gl/3H3bJ6 Learn the definition of various 3-D shapes through e
01:56
Types Of Triangles Song - Online Education Songs For Kids

3 years ago / 283 views

Worksheets, Cloze, Quiz, and more at Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] Triangle, tell me your secrets. Are you Scalene, Isosceles, Right, Equilateral, Obtuse or Acute? There's more where this came from! http://goo.gl/3H
03:59
Volume Word Problems — Basic Example | Math | New SAT | Khan Academy

3 years ago / 190 views

Watch Sal work through a basic Volume word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s1-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous
05:09
Volume Word Problems — Harder Example | Math | New SAT | Khan Academy

3 years ago / 178 views

Watch Sal work through a harder Volume word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previou
03:52
Right Triangle Word Problems — Basic Example | Math | New SAT | Khan Academy

3 years ago / 169 views

Watch Sal work through a basic Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
05:33
Right Triangle Word Problems — Harder Example | Math | New SAT | Khan Academy

3 years ago / 193 views

Watch Sal work through a harder Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s6-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
03:52
Angles, Arc Lengths, And Trig Functions — Basic Example | Math | New SAT | Khan Academy

3 years ago / 178 views

Watch Sal work through a basic Angles, arc lengths, and trig functions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s4-harder?utm_source=YT&utm_medium=Desc&utm_campaig
03:45
Angles, Arc Lengths, And Trig Functions — Harder Example | Math | New SAT | Khan Academy

3 years ago / 195 views

Watch Sal work through a harder Angles, arc lengths, and trig functions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s5-easier?utm_source=YT&utm_medium=Desc&utm_campai
04:28
Circle Theorems — Basic Example | Math | New SAT | Khan Academy

3 years ago / 213 views

Watch Sal work through a basic Circle theorems problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s5-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the prev
04:10
Circle Theorems — Harder Example | Math | New SAT | Khan Academy

3 years ago / 246 views

Watch Sal work through a harder Circle theorems problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s8-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pre
04:19
Congruence And Similarity — Basic Example | Math | New SAT | Khan Academy

3 years ago / 172 views

Watch Sal work through a basic Congruence and similarity problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s6-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Misse
03:18
Congruence And Similarity — Harder Example | Math | New SAT | Khan Academy

3 years ago / 173 views

Watch Sal work through a harder Congruence and similarity problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s7-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Miss
08:17
Right Triangle Geometry — Basic Example | Math | New SAT | Khan Academy

3 years ago / 187 views

Watch Sal work through a basic Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s7-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed
03:43
Right Triangle Geometry — Harder Example | Math | New SAT | Khan Academy

3 years ago / 151 views

Watch Sal work through a harder Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s4-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed
01:53
Circle Equations — Basic Example | Math | New SAT | Khan Academy

3 years ago / 208 views

Watch Sal work through a basic Circle equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s8-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pre
02:49
Circle Equations — Harder Example | Math | New SAT | Khan Academy

3 years ago / 188 views

Watch Sal work through a harder Circle equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s3-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pr
05:02
Positive And Negative Slope | Algebra I | Khan Academy

3 years ago / 223 views

Positive and negative slope Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/v/similar-triangles-to-prove-that-the-slope-is-constant-for-a-line?utm_source=YT&utm_medium=Desc&utm_campaign
02:34
Converting From Standard Form To Slope-intercept Form | Algebra I | Khan Academy

3 years ago / 225 views

Standard form to slope-intercept form Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/e/slope-from-an-equation-in-standard-form?utm_source=Y
02:35
Interpreting Linear Formulas Example 2 | Algebra I | Khan Academy

3 years ago / 150 views

Linear equation for file transfer Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/e/interpreting-features-of-linear-function
05:30
Graphing Linear Functions Example 1 | Algebra I | Khan Academy

3 years ago / 168 views

Learn how graph a linear function. This video gives an example of graphing fuel consumption as a function of distance. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-
03:12
Graphing Linear Functions Example 2 | Algebra I | Khan Academy

3 years ago / 188 views

Graphing equation for filling pool Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/e/graphing-linear-functions-word-problems?utm
01:07
How To Match Function Input To Output Given The Graph (example) | Algebra I | Khan Academy

3 years ago / 168 views

Sal finds the input value for which g(x)=-2 given the graph of g. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inputs_outputs?utm_so
01:49
How To Find Two Function Inputs With The Same Output Given Graph (example) | Khan Academy

3 years ago / 187 views

Sal finds the input value other than -5 for which f(x)=f(-5), given the graph of f. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inp
05:09
Converting From Slope-intercept To Standard Form | Algebra I | Khan Academy

3 years ago / 217 views

Converting from slope-intercept to standard form Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/e/converting_between_slope_intercept_and_st
07:23
Introduction To Transformations | Transformations | Geometry | Khan Academy

3 years ago / 176 views

Introduction to transformations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=De
01:37
Translation Example | Transformations | Geometry | Khan Academy

3 years ago / 176 views

Translation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campa
01:25
Using Rotation Widget | Transformations | Geometry | Khan Academy

3 years ago / 218 views

Using rotation widget Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-rotations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campai
01:48
Using Reflection Tool | Transformations | Geometry | Khan Academy

3 years ago / 226 views

Using reflection tool Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-reflections-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_camp
01:32
Formal Translation Tool Example | Transformations | Geometry | Khan Academy

3 years ago / 177 views

Formal translation tool example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-translations/e/defining-translations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the
01:55
Drawing Image Of Translation | Transformations | Geometry | Khan Academy

3 years ago / 209 views

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-translations/e/translations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org
02:46
Defining Rotation Example | Transformations | Geometry | Khan Academy

3 years ago / 184 views

Defining rotation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/defining-rotations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson
05:41
Points On Line Of Reflection | Transformations | Geometry | Khan Academy

3 years ago / 178 views

Points on line of reflection Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/e/defining-reflections?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next
07:19
Reflecting Segments Over Line | Transformations | Geometry | Khan Academy

3 years ago / 166 views

Reflecting segments over line Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/e/reflections-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesso
02:28
Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

3 years ago / 196 views

Drawing line of reflection Watch the next lesson: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/v/determining-the-line-of-reflection?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Missed the previous lesson? https://www
10:32
Rotating About Arbitrary Point | Transformations | Geometry | Khan Academy

3 years ago / 179 views

Rotating about arbitrary point Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-2?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson:
08:13
Points After Rotation | Transformations | Geometry | Khan Academy

3 years ago / 167 views

Points after rotation Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://w
04:50
The Mathematical Secrets Of Pascal’s Triangle - Wajdi Mohamed Ratemi

3 years ago / 260 views

View full lesson: http://ed.ted.com/lessons/the-mathematical-secrets-of-pascal-s-triangle-wajdi-mohamed-ratemi Pascal’s triangle, which at first may just look like a neatly arranged stack of numbers, is actually a mathematical treasure trove. But what abo
Featured
01:04
Coordinates For Triangle Example

3 years ago / 213 views
03:47
Example Finding Area With Fractional Sides

3 years ago / 211 views

Example finding area with fractional sides
07:02
Intuition For Area With Fractional Side Lengths

3 years ago / 241 views

Intuition for area with fractional side lengths
Featured
02:57
Intuition For Area Of A Parallelogram

3 years ago / 203 views

Intuition for area of a parallelogram
Featured
05:30
Intuition For Area Of A Triangle

3 years ago / 277 views

Intuition for area of a triangle
Featured
03:34
Finding Surface Area Using Net

3 years ago / 197 views

Finding surface area using net
04:44
Surface Area Of A Box Using Nets

3 years ago / 181 views

Surface area of a box using nets
02:25
Surface Area Of A Box

3 years ago / 212 views

Surface area of a box
Featured
02:42
Drawing Polygons Exercise Example

3 years ago / 175 views

Drawing polygons exercise example
02:22
Coordinates Of Rectangle Example

3 years ago / 187 views

Coordinates of rectangle example
03:51
Dimensions Of Rectangle From Coordinates Example

3 years ago / 204 views

Dimensions of rectangle from coordinates example
02:41
Finding Coordinates Of Missing Vertex Example

3 years ago / 379 views

Finding coordinates of missing vertex example
02:08
Area Of Parallelogram On Coordinate Plane

3 years ago / 187 views

Area of parallelogram on coordinate plane
57:34
Topology, Geometry And Life In Three Dimensions

3 years ago / 212 views

If you imagine a three dimensional maze from which there is no escape, how can you map it? Is there a way to describe what all possible mazes look like, and how do mathematicians set about investigating them? Subscribe for regular science videos: http://b
07:32
Examples Interpreting Graphs Of Proportional Relationships

3 years ago / 253 views

Examples interpreting graphs of proportional relationships
05:56
Intervals When Function Is Increasing, Decreasing, Postive Or Negative

3 years ago / 260 views

Intervals when function is increasing, decreasing, postive or negative
06:58
Average Rate Of Change From Graph

3 years ago / 245 views

Average rate of change from graph
07:43
How To Trisect An Angle With Origami - Numberphile

3 years ago / 290 views

Zsuzsanna Dancso trisects an angle using origami - follows on from this video about Euclidean geometry: http://youtu.be/6Lm9EHhbJAY Special thanks to the Patreon supporters listed below: Herschal Sanders (from Susan) Lê OK Merli Alex Bozzi Thomas J
16:51
Euclid's Big Problem - Numberphile

3 years ago / 282 views

Trisecting angles and calculating cube roots was a big problem for Euclid and his cohorts. Discussed by Zsuzsanna Dancso at MSRI. TRISECT WITH ORIGAMI: http://youtu.be/SL2lYcggGpc CIRCLE THE SQUARE: http://youtu.be/CMP9a2J4Bqw NUMBERPHILE Website: http://
03:35
Dimensions Of Cube From Volume

3 years ago / 286 views

Dimensions of cube from volume
02:59
Arc Length As Fraction Of Circumference

3 years ago / 392 views

Arc length as fraction of circumference More free lessons at: http://www.khanacademy.org/video?v=XFI7GK4Nv-s
04:01
Introduction To Line Plots

3 years ago / 250 views

Introduction to line plots
07:49
Idea Behind Hypothesis Testing

3 years ago / 217 views

Idea behind hypothesis testing
06:57
Area Of Triangle In Grid

3 years ago / 236 views

Area of triangle in grid
06:27
Ellipse Focus Intuition Exercise

3 years ago / 271 views

Ellipse focus intuition exercise
08:46
Geometric Precision Practice

3 years ago / 229 views

Geometric precision practice
07:23
Ways To Cut A Cube

3 years ago / 240 views

Ways to cut a cube
08:45
Line And Angle Proofs Exercise

3 years ago / 213 views

Line and angle proofs exercise
04:53
Showing Angles Have Same Measure

3 years ago / 218 views
05:35
Another Example Using Compass And Straightedge For Tangent Line

3 years ago / 335 views

Another example using compass and straightedge for tangent line
05:50
Constructing A Tangent Line Using Compass And Straightedge

3 years ago / 238 views

Constructing a tangent line using compass and straightedge
07:56
Math Antics - Circles, Circumference And Area

3 years ago / 466 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
Featured
07:58
Math Antics - Circles, What Is PI?

3 years ago / 423 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
Featured
10:27 Popular
Math Antics - Area

3 years ago / 1,297 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
Featured
07:29
Math Antics - Perimeter

3 years ago / 359 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
09:50
Math Antics - Quadrilaterals

3 years ago / 372 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
07:40
Math Antics - Triangles

3 years ago / 429 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
07:27
Math Antics - Polygons

3 years ago / 399 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
09:17
Math Antics - Angles&Degrees

3 years ago / 282 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
07:46
Math Antics - Angle Basics

3 years ago / 309 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
07:54
Math Antics - Points, Lines,&Planes

3 years ago / 287 views

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
08:50
Visual Pythagorean Theorem Proof

3 years ago / 255 views

Visual Pythagorean Theorem Proof - some basic geometry required
06:41
Midpoint Formula

3 years ago / 224 views

Midpoint Formula More free lessons at: http://www.khanacademy.org/video?v=Ez_-RwV9WVo
13:03
Pythagorean Theorem

3 years ago / 257 views

Pythagorean Theorem More free lessons at: http://www.khanacademy.org/video?v=AEIzy1kNRqo
03:00
Pythagorean Theorem 3

3 years ago / 214 views

U07_L2_T1_we3 Pythagorean Theorem 3 More free lessons at: http://www.khanacademy.org/video?v=T0IOrRETWhI Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:17
Pythagorean Theorem 2

3 years ago / 252 views

U07_L2_T1_we2 Pythagorean Theorem 2 More free lessons at: http://www.khanacademy.org/video?v=O64YFlX1_aI Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:32
Pythagorean Theorem 1

3 years ago / 252 views

U07_L2_T1_we1 Pythagorean Theorem 1 More free lessons at: http://www.khanacademy.org/video?v=JVrkLIcA2qw Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:29
Perpendicular Lines

3 years ago / 260 views

U04_L2_T2_we1 : Perpendicular Lines More free lessons at: http://www.khanacademy.org/video?v=0671cRNjeKI Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:43
Parallel lines 3

3 years ago / 200 views

U04_L2_T1_we3 : Parallel lines 3 More free lessons at: http://www.khanacademy.org/video?v=y5yNi08cr6I Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:03
Parallel Lines 2

3 years ago / 206 views

U04_L2_T1_we2 : Parallel Lines 2 More free lessons at: http://www.khanacademy.org/video?v=lOWXZFP8Vuc Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:49
Parallel Lines

3 years ago / 236 views

U04_L2_T1_we1 : Parallel Lines More free lessons at: http://www.khanacademy.org/video?v=T-aCweuimis Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
07:57
Point-slope and standard form

3 years ago / 210 views

U04_L1_T4_we2 : Point-slope and standard form More free lessons at: http://www.khanacademy.org/video?v=-6Fu2T_RSGM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:07
Converting to slope-intercept form

3 years ago / 265 views

U04_L1_T4_we1 : Converting to slope-intercept form More free lessons at: http://www.khanacademy.org/video?v=V6Xynlqc_tc Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:02
Graphing a line in slope intercept form

3 years ago / 210 views

U04_L1_T3_we1 : Graphing a line in slope intercept form More free lessons at: http://www.khanacademy.org/video?v=uk7gS3cZVp4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:25
X and Y intercepts 2

3 years ago / 215 views

U04_L1_T2_we2 : X and Y intercepts 2 More free lessons at: http://www.khanacademy.org/video?v=405boztgZig Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:08
X and Y intercepts

3 years ago / 238 views

U04_L1_T2_we1 : X and Y intercepts More free lessons at: http://www.khanacademy.org/video?v=xGmef7lFc5w Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:03
Slope Example

3 years ago / 239 views

U04_L1_T1_we2 : Slope Example More free lessons at: http://www.khanacademy.org/video?v=jTCZfMMcHBo Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:40
Slope of a line

3 years ago / 214 views

U04_L1_T1_we1 : Slope of a line More free lessons at: http://www.khanacademy.org/video?v=R948Tsyq4vA Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:35
Volume of a Sphere

3 years ago / 268 views

u07_l3_t1_we2 Volume of a Sphere More free lessons at: http://www.khanacademy.org/video?v=IelS2vg7JO8 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:03
Perimeter and Area of a Non-Standard Polygon

3 years ago / 304 views

u07_l2_t2_we3 Perimeter and Area of a Non-Standard Polygon More free lessons at: http://www.khanacademy.org/video?v=7S1MLJOG-5A Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:44
Area of a Trapezoid

3 years ago / 300 views

u07_l2_t2_we2 Area of a Trapezoid
01:20
Perimeter of a Polygon

3 years ago / 220 views

u07_l2_t2_we1 Perimeter of a Polygon More free lessons at: http://www.khanacademy.org/video?v=5ZCKr4wTQvI Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
01:42
Finding Missing Angles

3 years ago / 243 views

u07_l1_t2_we3 Finding Missing Angles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:36
Identifying Complementary and Supplementary Angles

3 years ago / 220 views

u07_l1_t2_we2 Identifying Complementary and Supplementary Angles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:35
Identifying Parallel and Perpendicular Lines

3 years ago / 384 views

u07_l1_t2_we1 Identifying Parallel and Perpendicular Lines More free lessons at: http://www.khanacademy.org/video?v=aq_XL6FrmGs Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:35
Acute Obtuse and Right Angles

3 years ago / 273 views

u07_l1_t1_we2 Acute Obtuse and Right Angles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:41
Identifying Rays

3 years ago / 222 views

u07_l1_t1_we1 Identifying Rays More free lessons at: http://www.khanacademy.org/video?v=w9jEq6dmqPg Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
07:13
Volume of a Composite Shape

3 years ago / 215 views

u07_l3_t1_we3 Volume of a Composite Shape
03:27
Identifying Geometric Solids

3 years ago / 220 views

u07_l3_t1_we1 Identifying Geometric Solids
06:12
Area and Perimeter of Composite Figures

3 years ago / 285 views

u07_l2_t3_we4 Area and Perimeter of Composite Figures
02:45
Area of a Circle

3 years ago / 224 views

u07_l2_t3_we3 Area of a Circle
03:09
Circumference of a Circle

3 years ago / 267 views

u07_l2_t3_we2 Circumference of a Circle
02:01
Parts of a Circle

3 years ago / 237 views

u07_l2_t3_we1 Parts of a Circle More free lessons at: http://www.khanacademy.org/video?v=04N79tItPEA Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:07
Quadrilateral Properties

3 years ago / 249 views

u07_l2_t1_we1 Quadrilateral Properties More free lessons at: http://www.khanacademy.org/video?v=5CeBlu260Rw Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:55
Pythagorean Theorem Application

3 years ago / 215 views

u07_l1_t4_we2 Pythagorean Theorem Application
01:37
Using the Pythagorean Theorem

3 years ago / 228 views

u07_l1_t4_we1 Using the Pythagorean Theorem
05:34
Application of Similar Triangles

3 years ago / 281 views

u07_l1_t3_we5 Application of Similar Triangles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:23
Missing Measurements for Similar Triangles

3 years ago / 221 views

u07_l1_t3_we4 Missing Measurements for Similar Triangles
03:07
Similar Triangles Corresponding Sides and Angles

3 years ago / 257 views

u07_l1_t3_we3 Similar Triangles Corresponding Sides and Angles
03:53
Congruent and Similar Triangles

3 years ago / 330 views

u07_l1_t3_we2 Congruent and Similar Triangles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
14:45
Distance Between Planes

3 years ago / 248 views

2010 IIT JEE Paper 1 Problem 51 Distance Between Planes More free lessons at: http://www.khanacademy.org/video?v=v8plb6V8BQo
12:12
Point distance to plane

3 years ago / 221 views

Distance between a point and a plane in three dimensions More free lessons at: http://www.khanacademy.org/video?v=7rIFO8hct9g
09:58
Normal vector from plane equation

3 years ago / 245 views

Figuring out a normal vector to a plane from its equation More free lessons at: http://www.khanacademy.org/video?v=gw-4wltP5tY
12:17
IIT JEE Circle Hyperbola Common Tangent Part 5

3 years ago / 337 views

2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 5 More free lessons at: http://www.khanacademy.org/video?v=rPoqpQcgNv4