Dye, Figure L 9c

• The symmetry group of the tiling is *2222 (pmm).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains two equilateral triangles.
• Contains two regular two-pointed star polygons with vertex angle of 60°.
• There is one non-regular reflective tile and one reflective pair.
• The tiling satisfies the interlace condition and has no finite interlace and four infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 102 polygons.

1. Figure L 9c (Interlocked narrow windows, Chengtu, Szechwan, 1900 AD) of Daniel Sheets Dye. Chinese Lattice Designs, Dover, 1937. ISBN 048623096. [dye] {Important book topic.}

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