4:00

Fun Blue Semicircle

3:46

Harder than it looks!

5:42

2 Squares 1 Semicircle

8:31

Square Root of Imaginary Number

5:16

Cool Geometry Puzzle

14:02

Is 1/4 of the circle shaded? Most students get this wrong

7:35

Coolest Math Challenge

14:32

I Made an Electronic Chessboard Without Turns