are all made out of some kind of metal alloy (e.g. bronze), are usually a dodecahedron but sometimes different (e.g. an icosahedron with 20 faces), yet all are hollow and usually with a single ...

There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a 3D shape with a constant polygon shaped cross-section. A prism is named by the shape ...

Regular Octahedron National Museum of American History Polyhedron Model by Martin Berman, Cube National Museum of American History Polyhedron Model by Martin Berman, Regular Icosahedron ...