Three Symmetrohedra

Symmetrohedra are polyhedra which have many (but not all) faces regular, and have some form of polyhedral symmetry. Here’s one that has regular decagons and triangles, along with trapezoids appearing in “bowtie” pairs.

symmetroheron featuring regaular decagons.gif

The next one has regular dodecagons and decagons, along with trapezoids which closely resemble triangles, and some very thin rectangles.

122 faces 20 dodecagons 12 decagons 40 trapezoids 30 thin rectangles.gif

Finally, in the last of these three, the regular faces are dodecagons and pentagons. For the irregular faces, there are two different types of trapezoids.

152 faces 12pentqgons 20 dodecagong 60trapsand 60 difftraps.gif

All three of these were made with Stella 4d, which you can try for free right here.

Thirteen Zonohedra with Cuboctahedral Symmetry

You can make these images larger by clicking on them.

These were all created using Stella 4d, which you can try for free right here.

A Polyhedron Featuring Eight Regular Enneagons and Twenty-four Kites

8 enneagons and 24 kites

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

A Symmetrohedron Featuring Regular Hexadecagons and Regular Hexagons

Image

symmetrohedron featuring reguarhexadecagons and hexagons.gif

I made this using Stella4d, which you can try for free right here.

A Polyhedron with 62 Faces Which Features Eight Regular Dodecagons

Polyhedron featuring 62 faces with 8 of them regular dodecagons

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

Tessellation of Rhombi and Star Hexagons

Image

tessellation

A Rhombic Triacontahedron with Faces Which Are Tessellated

Rhombic Triaconta.gif

I used three programs to make this: Stella 4d, Geometer’s Sketchpad, and MS-Paint. You can try Stella for free at http://www.software3d.com/Stella.php.

Another Octagon-Tessellation

octagons tiling a plane again

I’ve lost count of how many tessellations of octagons have appeared here. This might be the fifth one.

Cluster of 33 Icosidodecahedra

There’s one icosidodecahedron at the center of this cluster, with more icosidodecahedra attached to each of the central figure’s 32 faces. In the first version, the coloring is simply based as the number of sides for each face.

Augmented Icosidodeca 33.gif

In the next picture, the coloring is by face-type (position in the overall cluster).

Augmented Icosidodeca 33 color by face type.gif

The last image shown here has the cluster in “rainbow color mode.”

Augmented Icosidodeca 33 rainbow.gif

I used Stella 4d to make these — a program you may try for free right here.

Tessellation of Regular Pentagons and Tetraconcave Octagons

tessellation

I saw a tessellation similar to this on Facebook, and used Geometer’s Sketchpad and MS-Paint to re-create it with colors of my own choosing.