5 Platonic Solids Numberphile

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 and Website: Numberphile on Facebook: Numberphile tweets: Videos by Brady Haran Our thanks to the ki