MathArt example of rotational and translational symmetry, tessellation,
and nice exercise for students of angular measure of regular polygons.
credit:
http://mathtourist.blogspot.com/2013/06/roots-of-base-tiling.html
https://en.wikipedia.org/wiki/Rhombitrihexagonal_tiling
In geometry, the rhombitrihexagonal tiling is a semiregular tiling
of the Euclidean plane. There are one triangle, two squares,
and one hexagon on each vertex.
