Yemeni Square: Ali

• The symmetry group of the tiling is 442 (p4).
• All the internal angles of the constituent polygons are a multiple of 90°.
• There are no non-regular reflective pairs and one tile with no mirror image.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 89 polygons.

• Figure 1 (Colours from original at Amiriya Madrasa) of Brian Wichmann and John Rigby. Yemeni Squares, Leonardo, MIT Press, 2009. [wich3] {Vol 42, No 2, pp156-162}

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