Bourgoin, Plate 73

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 10°.
• Contains one regular enneagon.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• There are four non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 304 polygons.

1. Plate 73 of J Bourgoin. Arabic Geometrical Pattern and Design, Dover, 1879. ISBN 048622924. [bourgoin] {Classical book of around 200 hand-produced patterns, in back and white.} Fuller version available on Internet.

• Wade photo BOU 073

• Regular polygons with more than eight sides
• Tilings not constructible by straightedge and compass

Photo?

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