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About RobertLovesPi

I go by RobertLovesPi on-line, and am interested in many things, a large portion of which are geometrical. Welcome to my own little slice of the Internet. The viewpoints and opinions expressed on this website are my own. They should not be confused with those of my employer, nor any other organization, nor institution, of any kind.

Chiral Symmetrohedron #2

In the last post here, I displayed a chiral symmetrohedron derived from the snub dodecahedron, and today I am presenting its “little brother,” which is derived from the snub cube. Both models were created using the “morph duals by truncation” function of Stella 4d: Polyhedron Navigator, a program you can download and try, for free, at this website. This newer solid contains six squares, 32 equilateral triangles, and 24 irregular pentagons, for a total of 62 faces.

A Chiral Symmetrohedron

This symmetrohedron was derived from the snub dodecahedron. It contains twelve regular pentagons and sixty irregular pentagons, as well as eighty equilateral triangles, for a total of 152 faces. I made it using Stella 4d (with the “morph duals by truncation” function), a program you can download and try, for free, at this website.

A Polyhedron Derived From the Great Rhombicosidodecahedron

I made this using Stella 4d, which you can try for yourself right here.

Four Polyhedra Derived From the Icosidodecahedron

I created these using Stella 4d, which you can try for free at this website.

A Symmetrohedron Derived From the Great Rhombicosidodecahedron

This solid has all the faces of the great rhombicosidodecahedron, plus 120 scalene triangles. I made it using Stella 4d, which you can try for free right here.

Kepler’s “Stella Octangula,” With Ten Variants

Here’s Johonnes Kepler’s Stella Octangula — also known as the compound of two tetrahedra.

What follows are ten variants of this solid, all made using Stella 4d: Polyhedron Navigator, which you can try for free at http://www.software3d.com/Stella.php.

A 90-Faced Polyhedron

This polyhedron has sixty kite faces and thirty octagonal faces. I made it using Stella 4d, which you can try for free at http://www.software3d.com/Stella.php.

A Polyhedron Featuring Twenty Regular Octadecagons and Twelve Regular Decagons

I made this using Stella 4d, which you can try for free right here.

Regular Octadecagons As Faces of Symmetrohedra

I tried to make a symmetrohedron using regular octadecagons and regular decagons, but that combination forces the octadecagons to overlap, and that causes the would-be symmetrohedron to be non-convex.

I tried to augment these octadecagons with antiprisms, and then form the convex hull of the result. Here’s what I found:

I made these using Stella 4d, which you can try for free right here.

A Face-Based Zonohedrified Rhombic Enneacontahedron

The decagons and octagons in this zonohedron are regular. The octadecagons are, sadly, only equilateral. I made this using Stella 4d, which you can try for free, right here.