Bourgoin, Plate 125

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 1°.
• Contains three regular pentagons.
• Contains one regular 9-pointed star polygon with vertex angle of 72°.
• Contains one regular 12-pointed star polygon with vertex angle of 72°.
• There are 13 non-regular reflective tiles (including 5 kites) and one reflective pair.
• The tiling satisfies the interlace condition and has 7 finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 589 polygons.

1. Page 187 of S J Abas and A S Salman. Symmetries of Islamic Geometrical Patterns, World Scientific, 1995. ISBN 981021704. [abas] {Very many patterns in black and white, no sources given.}
2. Plate 125 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.
3. Thesaurus Islamicus M114P0084, M114P0055 (Amir Qijmas al-Ishaqi, Cairo, Egypt. Minbar) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

• Wade photo BOU 125

• Tilings not constructible by straightedge and compass

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