Tag Archives: nonagon

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.

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Tessellation Featuring Regular Enneagons, Regular Hexagons, and Isosceles Triangles

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Tessellation Featuring Regular Enneagons and Hexaconcave, Equilateral Dodecagons

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Three Convex Polyhedra with Tetrahedral Symmetry, Each Featuring Four Regular Enneagons

In addition to the four regular enneagons, the polyhedron above also has rhombi and isosceles triangles as faces. The next one, however, adds equilateral triangles, instead, to the four regular enneagons, along with trapezoids and rectangles. Only the last of … Continue reading

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Tessellation Using Regular Enneagons, Rhombi, and Hexaconcave Dodecagons

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Nine (2015) / Nine (2013)

First, the newer version I just made: Next, the 2013 version, which I recently found, along with a bunch of other previously-lost stuff from around then. The two are simply color-inversions of each other, according to the rules for color-inversion … Continue reading

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A Polyhedron Featuring Enneagons and Two Types of Pentagon

Enneagons are nine-sided polygons, and some people prefer to call them “nonagons.” I try not to use the latter term because it mixes Greek and Latin word-parts, which the former term, derived purely from Greek, does not do. This was … Continue reading

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