Dsm24995

@dsm24995
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0:31
How to draw a tangent to a circle from a point-WHym_d8Q
7 years ago
0:27
How to draw a pentagon-xUvJh
7 years ago
0:25
Friction-s4E
7 years ago
0:26
The mathematics of folding a piece of paper-B_rM_c4k
7 years ago