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 ...

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