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Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

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 Brain Teasers   |   Geometry   |   Math
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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 shaded region looks like a claw. This video presents two methods to solve this problem.

Blog post: http://wp.me/p6aMk-4Rm

Sources for problem
PLSE style circle problem (Mindscope Khoo channel)
https://www.youtube.com/watch?v=yb_JUZFKi-A

Challenging area question - 4 quarter circles and square
http://studyroom.sg/12/

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