truetrue English Figure to illustrate the area moment of an regular (equiliteral) triangle at the list of second moments of area. author name string: Darkcoucou
Alike 3.0 truetrue English Infinite tiling by regular elements of two different shapes: hexagons and triangles not edge‑to‑edge. Every element adjoins by any
two non-regular tetrahedrons upside down); the A atoms are at the top and at the bottom, and the B atoms are at the summits of the triangle. One hexahedron