A polyform is a geometric shape formed by joining copies of a single shape. The best known polyforms are polyominoes, made from squares. Solomon W. Golomb coined the term, studied polyominoes extensively, and published a book about them. Other plane polyforms include polyiamonds, made from equilateral triangles; polyaboloes or polytans, made from isosceles right triangles; polyhexes, made from regular hexagons; and polylines or polysticks, made from straight lines. Solid polyforms include polycubes, polyominoids, and polyrhons.

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