Bourgoin, Plate 180

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 18°.
• Contains five regular two-pointed star polygons with vertex angle of 72°.
• Contains two regular pentagons.
• Contains one regular 10-pointed star polygon with vertex angle of 72°.
• There are four non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has four finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 297 polygons.

1. Page 339, Fig. 245c (Abu al-Bakr Muzhir, Cairo, Egypt) from [bonner] (1479-80AD, 884-5AH)
2. From Tony Lee (Shaykh Abu Shibak, Cairo, Egypt. South door of Mausoleum) from [pc] (19th century AD)
3. Figure 25 (Same type of pattern but with a different vertex angle) from [lee]
4. Page 323 from [abas]
5. Plate 180 from [bourgoin]

• Wade photo BOU 180

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