16 designs by sef
All designs by SEF
Maths, science, computing and music specialist with side interests in dancing, font design, celtic knotwork etc
Special cases of rectangles, where the root of the ratio of sides is a rational number, so that there are rotational angles where the vertices line up along the axes again. This includes squares, A#-papers (ie root 2), hexagons (ie root 3 based) and root 5 combinations etc.