Dye, Figure C 17b

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one square.
• There are two non-regular reflective tiles.
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 140 polygons.

1. Figure C 17b (Elongated Turtle-Back Pattern, Yuan-yeh, Soochow, Kiangsu, 1635 AD) of Daniel Sheets Dye. Chinese Lattice Designs, Dover, 1937. ISBN 048623096. [dye] {Important book topic.}

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