I found these on Facebook, and could find no evidence that I’d ever blogged them here — so here they are. The first one is based on the number nine, while the second is based on fifteen.
In addition to the central dodecagon, this mandala has two rings of squares, one of equilateral triangles, a ring of rhombi, another of regular hexagons, and, finally, a ring of equilateral decagons.
I just found this on Facebook. I made it two years before starting this blog.
To make this, I used Stella 4d: Polyhedron Navigator to take the image I blogged here, and then project it onto the faces of a rhombic dodecahedron. Next, I put that polyhedron into motion for the .gif shown below.
If you’d like to give Stella a free try, the site to visit is http://www.software3d.com/Stella.php.
This decagonal mandala is split into fifty golden triangles (shown in yellow), and forty golden gnomons (shown in orange).