Tags » Icosahedron


May 21 – 141

Move & Turn. Truncated stereo-icosahedron on a Japanese background.

One Image A Day - 364 Days


I’m always impressed by the knowledge and talent of our geometry students.  They enjoyed the last couple weeks of school by making origami polyhedrons.

(c) Website and all images copyright Kaitlin Taylor 2015


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


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