Tags » Nonagon

Four Polyhedra Featuring Enneagons

Enneagons are also called nonagons; they are polygons with nine sides. I used Stella 4d to make these four rotating polyhedra, and you may try this program for yourself at… 7 more words


Tessellation of Triangles and Pentagons

Alternately, this can be seen as a tessellation of hexagons and enneagons. Which do you see?



02-02. Fluorite #5.

Strange flower!

This visualization is made from 90,  9 sided atoms. O polyhedra this time. The nonagon is a geometric figure not constructible with compass and straightedges. 29 more words

Applied Sciences

A Polyhedron Made of Enneagons and Pentagons

This polyhedron has 20 enneagons and 12+60=72 pentagons (of two types) as faces. I made it using Stella 4d, which is available at http://www.software3d.com/Stella.php.