Illustration showing the combination of various regular systems.
Illustration showing tetragonal combination forms.
Illustration showing a trigonal dodecahedron.
Illustration showing the combination of a hexahedron and an dodecahedron.
Illustration showing the combination of a hexahedron and an octahedron.
Illustration showing the combination of a octahedron and an dodecahedron.
Illustration showing the derivation of Tetrahedron from an Octahedron.