Dye, Figure R 9a

• The symmetry group of the tiling is 442 (p4).
• All the internal angles of the constituent polygons are a multiple of 90°.
• Contains one square.
• There is one non-regular reflective tile.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 27 polygons.

1. Figure 147 (a) of S W Golomb. Polyominoes, Revised and expanded second edition. Princeton University Press, 1994. ISBN 069102444. [golomb1]
2. Figure R 9a (Swastikas in echelon, Kwanhsien, north west of Chengtu, Szechwan. 1850 AD) of Daniel Sheets Dye. Chinese Lattice Designs, Dover, 1937. ISBN 048623096. [dye] {Important book topic.}

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