Polyiamond

Polyiamonds are special shapes that are made up of flat shapes called polygons. Polygons are shapes with sides that can be made up of both straight lines and curves. Polyiamonds are made up of any polygons, with each side being the same length. The shapes that work best for making up a Polyiamond are of course diamonds, but also some other shapes like triangles, squares and hexagons. To make a Polyiamond, put the polygons together so that their sides are joined along their edges in order to form something that looks like a big diamond shape.