Thank You, Coca-Cola Inc., for Promoting Archimedean Solid Awareness!

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Thank You, Coca-Cola Inc., for Promoting Archimedean Solid Awareness!

I was delighted to see that cans of Coca-Cola® now on sale feature a picture of a truncated icosahedron. This is real progress!

Snub Dodecahedron Variant

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Snub Dodecahedron Variant

In this polyhedron, there are twelve pentagons and sixty kites. It can be made by augmenting twenty of the triangles in a snub dodecahedron with short pyramids, but the pyramid-height has to be just right, in order to make those pyramids’ lateral faces coplanar with the non-augmented triangles, which produces the kites.

Since this polyhedron is chiral, a compound can be made by adding it to its own mirror image:

Compound of enantiomorphic pair

Both images were created using Stella 4d, software available at www.software3d.com/Stella.php.

120 Irregular Pentagons, Rotating About a Common Axis

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120 Irregular Pentagons, Rotating About a Common Axis

I made this using Stella 4d, software you can try and/or buy at http://www.software3d.com/Stella.php.

The “holes” are actually hexagonal and decagonal faces which have been made invisible. Here’s what the polyhedron looked like before I hid them:

120 pentagons plus

If you’d like to see this second image enlarged, simply click on it.