Bourgoin, Plate 190

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 36°.
• Contains one regular two-pointed star polygon with vertex angle of 72°.
• Contains one regular pentagon.
• Contains one regular 10-pointed star polygon with vertex angle of 72°.
• There are 13 non-regular reflective tiles (including 2 kites).
• The tiling satisfies the two-colour condition with straight cross-overs, but interlace counts not determined.
• The tiling is edge-to-edge.
• As drawn, contains about 1601 polygons.

1. Internet photo (Sultan Ahmed Mosque, Istanbul, Turkey. Gate) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]
2. Plate 190 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 190

• First Decagonal motif

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