Geometry

02:18
Tie a string around the world

1 week ago / 24 views

This seems a difficult problem, but simple mathematics can sometimes beat intuition, as Rob shows. See how you get on.
10:54
Non-Euclidean Geometry Explained - Hyperbolica Devlog #1

2 months ago / 15 views

I present the easiest way to understand curved spaces, in both hyperbolic and spherical geometries. This is the first in a series about the development of Hyperbolica. Chapters: 0:00 Intro 0:24 Spherical Geometry 2:33 Hyperbolic Introduction 3:53 Projecti
00:26
How Egyptians Made Right Angles #shorts

3 months ago / 35 views

The Egyptians didn't know the Pythagorean Theorem, but they figured out a way to make perfect 3-4-5 right triangles using segments of rope. It's so common sense, unsophisticated, and elegant that it's an example of a proof without words AND mathematical b
00:58
The (Nearly) Perfect Pi Approximation #shorts

3 months ago / 34 views

We can't write out every digit of Pi every time we use it, but we've got to represent it somehow. And you were probably taught that 22/7 was a great option. Well... it's an okay option. It's not bad, but it's not amazing.355/113 is so close to the real va
11:00
Ten Dimensions Explained

5 months ago / 41 views

The ten dimensions explained thoroughly
22:58
Geometry Introduction - Basic Overview - Review For SAT, ACT, EOC, Midterm Final Exam

5 months ago / 35 views

The full version of this geometry review tutorial provides a basic introduction into common topics taught in geometry such as angles and measurement, area, perimeter, volume, surface area. It covers shapes such as circles, squares, rectangles, right trian
02:45
ASTEROIDS Size Comparison 2

7 months ago / 59 views

In this second part of the asteroid comparison, some of the currently best known asteroids are shown, some comets and some fictitious ones.~ - Approximate - Error range*UM - Unreliable MeasureMUSIC: (YouTube Library) Chtulthu - Quincas MoreiraSOURCES:Arma
00:59
Do Triangles Have Four Sides? #shorts

8 months ago / 74 views

#shirt #shorts join our brain food club to get it! http://www.curiositybox.comIn this short, we say hello to the "Sherman line" -- a feature of all triangles that made B.F. Sherman say, "what else was there to call [it] but the fourth side of the triangle
09:27
Hexagons are the Bestagons

1 year ago / 136 views

Behind the Scenes: https://www.youtube.com/watch?v=4R3N1oeKbE4 Hexagons are the Bestagons shirt: https://store.dftba.com/collections/all/products/hexagons-t-shirt Thank you Crowdfunders for making this video possible: https://www.patreon.com/cgpgrey Discu
22:55
The Golden Ratio: Is It Myth or Math?

1 year ago / 325 views

Were on PATREON! Join the community https://www.patreon.com/itsokaytobesmartSUBSCRIBE so you dont miss a video! http://bit.ly/iotbs_sub More info and sources below The golden ratio. Some say its the most mythical number in the universe. Others say it unde
38:28
A Miraculous Proof (Ptolemy's Theorem) - Numberphile

1 year ago / 113 views

Featuring Zvezdelina Stankova... Want more? Part 2 (bringing in Pentagons and the Golden Ratio) is at: https://youtu.be/o3QBgkQi_HAMore links & stuff in full description below Zvezda's Numberphile playlist: http://bit.ly/zvezda_videosZvezda's webpage: htt
21:19
The Mandelbrot Set - The only video you need to see!

1 year ago / 247 views

This video has been edited together from several documentaries to describe the Mandelbrot set in a simple, introduction/beginner fashion! What is the Mandelbrot set? An incredible mathematical formula explaining fractals and geometry! Several mathematicia
05:37
The Hardest Mandelbrot Zoom in 2017 - New record, 750 000 000 iterations!

1 year ago / 236 views

A Mandelbrot is a mathematical formula that can be represented mathematically as:The Mandelbrot set can be explained with the equation zn+1 = zn2 + c. In that equation, c and z are complex numbers and n is zero or a positive integer (natural number). Star
03:12
Approximating pi with Minecraft

1 year ago / 261 views

We use Minecraft to approximate the value of pi.
05:48
How Does a Real-Life Escherian Staircase Work?

1 year ago / 210 views

In this video I show you a 3d printed infinite staircase also called an Escherian staircase after M.C Escher. I talk about how this staircase can actually be possible in Nil space using non-euclidean geometry. Ascending in Nil Video: https://www.youtube.c
10:44
The Napkin Ring Problem

1 year ago / 174 views

Brain Candy Live FALL TOUR: http://www.braincandylive.com/ticketsThe Curiosity Box: https://www.curiositybox.com/LINKS TO LEARN MORE BELOW!my twitter: http://www.twitter.com/tweetsauceAdam and I (but mainly Adam) making a kendama: https://www.youtube.com/
16:54
Teacher Delivers Remote Virtual Reality Math Lesson on Angles using Half Life: Alyx

2 years ago / 219 views

Review of Angle Vocabulary for Homeschooling Week because I have to teach today, but Half Life Alyx just came out. Want to support my classroom? http://www.donorschoose.org/charlescoomber Twitter – @charlescoomber
02:41
SYMMETRY

2 years ago / 231 views

Symmetry is one of five shorts featured in the film, "Mathematica Peep Shows." The collection was made by Charles and Ray Eames for the IBM Mathematica Exhibit which opened in 1961. It is about the mathematical ordering of form and the symmetrical propert
16:38
Superhero Triangles - Numberphile

2 years ago / 229 views

Heronian triangles and other fascinating things, featuring Dr James Grime.Get your Superhero Triangle T-Shirt and other stuff: http://bit.ly/Super_TriMore links & stuff in full description below More videos with Dr Grime: http://bit.ly/grimevideosDr James
05:06
The Pizza Theorem

2 years ago / 328 views

Watch my newest video, "The Game You Win By Losing (Parrondo's Paradox)": https://youtu.be/PpvboBJEozMGet Vsauce's favorite science and math toys delivered to your door!https://www.curiositybox.com/National Pizza Day is Saturday, February 9!*** LINKS ***T
15:22
Squaring a Doughnut

2 years ago / 290 views

***LINKS TO LEARN MORE BELOW***Numberphile's Video About Squared Squareshttps://www.youtube.com/watch?v=NoRjwZomUK0 Torus Gameshttp://www.geometrygames.org/TorusGames/index.html.en https://levsblog.quora.com/The-Topology-of-Pacmanhttp://www.squaring.net/s
18:38
Mbius Bagels

3 years ago / 398 views

'Tis the season to cut bagels into interlocked halves!! LEARN MORE:George Hart's article: https://www.georgehart.com/bagel/bagel.htmlGeorge Hart's video: https://www.youtube.com/watch?v=dN8AwGUaqDAEugenia Cheng's video: https://www.youtube.com/watch?v=NRv
15:30
The Mandelbrot Set

3 years ago / 421 views

I will send my brain food right to your door: http://www.curiositybox.com Twitter: http://twitter.com/DoOnlineNowGuysInstagram: http://instagr.am/doonlinenowguysVsauce PO Box: PO Box 33168 L.A. CA 90033***Click "SHOW MORE" For Links*** Mandelbrot Zoomhttp
18:59
The Four Color Theorem | Coloring a Planar Graph

3 years ago / 270 views

Train your problem solving skills today with SkillShare: https://skl.sh/upandatom3 Check out the video we did over on Willie's Channel! https://youtu.be/jwQlULjESTs Subscribe to Willie's Channel KhAnubis! https://www.youtube.com/user/tobirates The Four Co
16:07
Terrific Toothpick Patterns - Numberphile

3 years ago / 331 views

Fun with toothpicks. Featuring Neil Sloane. More links & stuff in full description below ↓↓↓ Neil Sloane is the founder of the On-Line Encyclopedia of Integer Sequences: https://oeis.org Play with the toothpick simulator: http://oeis.org/A139250/a139250.a
07:26 Popular
Incredible Rolling Objects which aren't Spheres!

3 years ago / 800 views

These strange solids roll in interesting and unexpected ways! Join me as we explore these curious geometries the Wobbler, Oloid and Steinmetz Solid. 3D Print your own with the files here - https://gumroad.com/products/QGsID/ Get your own stainless steel O
03:43 Popular
Can you solve the unstoppable blob riddle? - Dan Finkel

3 years ago / 715 views

A shooting star crashes onto Earth and unleashes a hideous, rampaging blob. Can you stop it from destroying the planet? -- A shooting star crashes onto Earth and a hideous blob emerges. It creeps and leaps, it glides and slides. It’s also unstoppabl
04:54
The problem in Good Will Hunting - Numberphile

3 years ago / 344 views

We now have a Tumblr: Tumblr: http://numberphile.tumblr.com This paper on ebay: http://www.ebay.co.uk/itm/221197137799? More links & stuff in full description below ↓↓↓ Just how hard was the second problem cracked by Will in Good Will H
06:02
The Perfect Stack of Maltesers

3 years ago / 357 views

Dr Eugenia Cheng, Senior Lecturer in Mathematics from the University of Sheffield, discusses the mathematics behind the perfect stack of Maltesers http://www.sheffield.ac.uk/maths
08:01
Surface Area to Volume Ratios - Christmas Lectures with Philip Morrison

3 years ago / 591 views

The mathematicians of Lilliput assumed that Gulliver would need 1728 times as much food as an individual Lilliput. Philip Morrison shows why this is not true, using surface area to volume ratios. Watch the full lecture: http://www.rigb.org/christmas-lectu
04:32
Can you solve the time travel riddle? - Dan Finkel

3 years ago / 520 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 Popular
Can you solve the secret werewolf riddle? - Dan Finkel

3 years ago / 1,104 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 years ago / 381 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 years ago / 400 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 years ago / 472 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 years ago / 381 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 years ago / 522 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 years ago / 606 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 years ago / 377 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 Popular
How to Determine the Area of a Triangle Based on Coordinates of Its Vertices & Determinants

3 years ago / 827 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 years ago / 588 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 Popular
How to Multiply to Get the Area of a Parallelogram

3 years ago / 902 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 Popular
Types of Angles, Figures & Shapes

3 years ago / 889 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?

3 years ago / 482 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"

3 years ago / 338 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

3 years ago / 453 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

3 years ago / 579 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

3 years ago / 378 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

3 years ago / 323 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

3 years ago / 376 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

4 years ago / 434 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
01:20
Proof Without Words: The Circle

4 years ago / 366 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

4 years ago / 400 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

4 years ago / 365 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 Popular
How many ways are there to prove the Pythagorean theorem? - Betty Fei

4 years ago / 889 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

4 years ago / 536 views

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

4 years ago / 548 views

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

4 years ago / 508 views

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

4 years ago / 533 views

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

4 years ago / 485 views

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

4 years ago / 542 views

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

4 years ago / 530 views

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

4 years ago / 493 views

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

4 years ago / 478 views

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

4 years ago / 498 views

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

4 years ago / 505 views

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

5 years ago / 457 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 Popular
Math Antics - The Pythagorean Theorem

5 years ago / 1,318 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

5 years ago / 438 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 Popular
Pascal's Triangle - Numberphile

5 years ago / 742 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 Popular
Math Word problems - Solving triangles

5 years ago / 835 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 Popular
Area of a Triangle - Fun challenging math problem

5 years ago / 1,093 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
04:55 Popular
Solve the right triangle - Trigonometry Brain Teaser

5 years ago / 1,182 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

5 years ago / 583 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

5 years ago / 496 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 Popular
Math Challenge - Shrinking Pool Problem

5 years ago / 745 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 Popular
Easy Puzzle - But can you solve it?

5 years ago / 788 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

5 years ago / 543 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

5 years ago / 564 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

5 years ago / 623 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 Popular
Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

5 years ago / 853 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

5 years ago / 439 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

5 years ago / 480 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 Popular
Can You Solve The Hardest Easy Geometry Problem?

5 years ago / 903 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 Popular
Math Antics - Volume

5 years ago / 1,522 views

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

6 years ago / 905 views

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

6 years ago / 573 views

Ordering triangle sides and angles
04:29
Mathematical Present Wrapping

6 years ago / 470 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

6 years ago / 453 views

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

6 years ago / 494 views

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

6 years ago / 467 views

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

6 years ago / 431 views

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

6 years ago / 431 views

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

6 years ago / 423 views

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

6 years ago / 568 views

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

6 years ago / 845 views

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

6 years ago / 437 views

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

6 years ago / 555 views

Inscribed angles exercise example
05:27
Arc Measure

6 years ago / 427 views

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

6 years ago / 546 views

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

6 years ago / 456 views

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

6 years ago / 407 views

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

6 years ago / 441 views

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

6 years ago / 682 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 -
03:59
Volume Word Problems — Basic Example | Math | New SAT | Khan Academy

6 years ago / 580 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

6 years ago / 493 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

6 years ago / 530 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

6 years ago / 524 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

6 years ago / 604 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 Popular
Angles, Arc Lengths, And Trig Functions — Harder Example | Math | New SAT | Khan Academy

6 years ago / 785 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 Popular
Circle Theorems — Basic Example | Math | New SAT | Khan Academy

6 years ago / 756 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

6 years ago / 636 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 Popular
Congruence And Similarity — Basic Example | Math | New SAT | Khan Academy

6 years ago / 827 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 Popular
Congruence And Similarity — Harder Example | Math | New SAT | Khan Academy

6 years ago / 748 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

6 years ago / 615 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

6 years ago / 431 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

6 years ago / 595 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

6 years ago / 472 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

6 years ago / 533 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
02:35 Popular
Interpreting Linear Formulas Example 2 | Algebra I | Khan Academy

6 years ago / 713 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 Popular
Graphing Linear Functions Example 1 | Algebra I | Khan Academy

6 years ago / 829 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 Popular
Graphing Linear Functions Example 2 | Algebra I | Khan Academy

6 years ago / 733 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

6 years ago / 672 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 Popular
How To Find Two Function Inputs With The Same Output Given Graph (example) | Khan Academy

6 years ago / 786 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 Popular
Converting From Slope-intercept To Standard Form | Algebra I | Khan Academy

6 years ago / 840 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 Popular
Introduction To Transformations | Transformations | Geometry | Khan Academy

6 years ago / 744 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 Popular
Translation Example | Transformations | Geometry | Khan Academy

6 years ago / 943 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

6 years ago / 662 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 Popular
Using Reflection Tool | Transformations | Geometry | Khan Academy

6 years ago / 731 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 Popular
Formal Translation Tool Example | Transformations | Geometry | Khan Academy

6 years ago / 890 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

6 years ago / 626 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 Popular
Defining Rotation Example | Transformations | Geometry | Khan Academy

6 years ago / 981 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 Popular
Points On Line Of Reflection | Transformations | Geometry | Khan Academy

6 years ago / 795 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 Popular
Reflecting Segments Over Line | Transformations | Geometry | Khan Academy

6 years ago / 825 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 Popular
Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

6 years ago / 773 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

6 years ago / 693 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

6 years ago / 695 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 Popular
The Mathematical Secrets Of Pascal’s Triangle - Wajdi Mohamed Ratemi

6 years ago / 799 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
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Coordinates For Triangle Example

6 years ago / 450 views
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Example Finding Area With Fractional Sides

6 years ago / 577 views

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6 years ago / 652 views

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Intuition For Area Of A Parallelogram

6 years ago / 483 views

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6 years ago / 579 views

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6 years ago / 500 views

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Surface Area Of A Box Using Nets

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Drawing Polygons Exercise Example

6 years ago / 556 views

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6 years ago / 458 views

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6 years ago / 461 views

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6 years ago / 679 views

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6 years ago / 471 views

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Topology, Geometry And Life In Three Dimensions

6 years ago / 541 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
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Examples Interpreting Graphs Of Proportional Relationships

6 years ago / 621 views

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Intervals When Function Is Increasing, Decreasing, Postive Or Negative

6 years ago / 527 views

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6 years ago / 529 views

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7 years ago / 588 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
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7 years ago / 748 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://
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7 years ago / 638 views

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7 years ago / 1,059 views

Arc length as fraction of circumference More free lessons at: http://www.khanacademy.org/video?v=XFI7GK4Nv-s
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7 years ago / 574 views

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7 years ago / 484 views

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7 years ago / 598 views

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7 years ago / 579 views

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7 years ago / 573 views

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7 years ago / 502 views

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7 years ago / 480 views

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7 years ago / 548 views

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7 years ago / 731 views

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7 years ago / 581 views

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7 years ago / 455 views

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7 years ago / 467 views

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7 years ago / 649 views

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7 years ago / 513 views

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7 years ago / 701 views

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7 years ago / 453 views

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7 years ago / 439 views

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7 years ago / 447 views

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7 years ago / 471 views

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7 years ago / 446 views

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7 years ago / 495 views

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7 years ago / 651 views

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