They are the Platonic Solids, the tetrahedron, cube (hexahedron), octahedron, dodecahedron, and icosahedron, respectively. A Platonic Solid is a figure with all of its faces being the same, all its edges being the same length, and all of its angles being the same. There are only five platonic solids in 3 dimensions. The dodecahedron is my favorite! It has pentagonal faces, which I find really interesting. Math! <3
