Each of these is divided into smaller categories; triangles can be equilateral, isosceles, obtuse, acute, scalene, etc. while quadrilaterals can be rectangles, rhombi, trapezoids, squares, etc.
Not only squares have four sides of equal length; rhombi do as well.
The gameboard has an overall hexagonal shape and comprises 72 rhombi in three alternating colors.
A special case of a rhombohedron is one in the which the rhombi which form the faces have angles of 60 and 120.
It has 10 faces on the polar axis with 10 rhombi following the equator.
With pairs of triangles merged into rhombi, it can be seen as a trigonal trapezohedron.
Without the equal edge constraint, the wide rhombi are kites if limited only by the icosahedral symmetry.
The rhombic triacontahedron is a convex polytope that has a very special property: all of its faces are golden rhombi.
