*Stella 4d: Polyhedron Navigator* is selling at 25% off to help cure the boredom of people in isolation because of COVID-19. This software is used to make almost all of the polyhedral images on this blog. Trying the program to see if you like it is free. The website to visit to try Stella is http://www.software3d.com/Stella.php.

# Tag Archives: Mathematics

## Two Oblique All-Square Tessellations

### Image

# Sixteen {7/2} Star Heptagons

Two of the heptagrams are centered in the middle, while the other fourteen are smaller, and form a ring around the two in the center.

# Ten Pentagrams

The ten pentagrams meet at a common vertex in the center.

# A Decorated Rhombic Dodecahedron

The patterns on the faces are from the last post here, immediately before this one. I used *Stella 4d: Polyhedron Navigator* to make this, and you can try this software for free at this website.

# Fourteen Heptagrams

The fourteen heptagrams, also known as {7/3} star heptagons, meet at a common vertex in the center of the whole diagram. I did the math using *Geometer’s Sketchpad*, and then colored the result using *MS-Paint*.

# If I've tried this once, I've tried it at least fifty-five times….

It’s hard to get regular pentagons, regular star pentagons, regular decagons, and related polygons to tessellate the plane while maintaining radial symmetry. This is my latest attempt.