Straightforward Constructions

Truncated Tetrahedron Built from Seven Tetrahedrons

8 Triangles Each from One Tetrahedron Forming the Octahedron

8 Triangles Each from One Tetrahedron

12 Pentagons Each from One Dodecahedron

20 Triangles Each from One Icosahedron

Cuboctahedron Built by Six Octahedrons

Rhombic 240-hedron

240-Faced Polyhedron