## Tags » Icosahedron

#### Tangents from the World of Gaming

### Game On!

Occasionally, I come across some particularly interesting and unusual things related to gaming. This week I came across two: one related to dice… 318 more words

#### Two Polyhedral Compounds: the Dodecahedron / Truncated Octahedron, and Its Dual, the Icosahedron / Tetrakis Cube

That’s the compound of the dodecahedron and the truncated octahedron above. Shown next is its dual, the compound of the icosahedron and the tetrakis cube. Both compounds were made using… 9 more words

#### Four-Part Compound of the Icosahedron, the Dodecahedron, the Cuboctahedron, and the Rhombic Dodecahedron

This compound was created using *Stella 4d*, software you can try for yourself here.

#### Combining Octahedral and Icosahedral Symmetry to Form Pyritohedral Symmetry

Pyritohedral symmetry, seen by example both above and below, is most often described at the symmetry of a volleyball:

To make the rotating polyhedral compound at the top, from an octahedron and an icosahedron, I simply combined these two polyhedra, using 73 more words

#### Twenty-sided die from Ptolemaic Period

**Period:** Ptolemaic Period–Roman Period

**Date:** 2nd century B.C.–4th century A.D.

**Geography:** From Egypt

**Medium:** Serpentine

**Dimensions:** Height: 3.2 x L: 3.8 x W: 3.4 cm (1 1/4 x 1 1/2 x 1 5/16 in.) 21 more words