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This is Numberphile. We mainly post videos about mathematics and just numbers in general.

All Triangles are Equilateral

All Triangles are Equilateral

Brady Haran
Carlo Séquin, Triangles

A proof that all triangles are equilateral - can you see a problem with it? Featuring Carlo Séquin.

Discuss on reddit: http://redd.it/2ldovm

Carlo discusses Mobius Bridges: http://youtu.be/iwo7JReFTeg
Epic Circles: http://youtu.be/sG_6nlMZ8f4

Math and Movies (Animation at Pixar)

Math and Movies (Animation at Pixar)
Leyland Numbers

Leyland Numbers