pi_circle.png

Hello there.

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

5 Platonic Solids

5 Platonic Solids

Why are there just five platonic solids (and what are platonic solids!?)

The solids are the tetrahedron, hexahedron (cube), octahedron, icosahedron and dodecahedron.

Featuring Katie Steckles and James Grime - https://twitter.com/stecks and https://twitter.com/jamesgrime

Our thanks to the kind people at Polydron for giving Katie some pentagons - http://www.polydron.com/

Tau replaces Pi

Tau replaces Pi

Favourite Numbers

Favourite Numbers