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5 Platonic Solids - Numberphile

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Published on Nov 6, 2012

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

Website: http://www.numberphile.com/

Numberphile on Facebook: http://www.facebook.com/numberphile

Numberphile tweets: https://twitter.com/numberphile

Videos by Brady Haran

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

A run-down of Brady's channels:
http://periodicvideos.blogspot.co.uk/...

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