Bourgoin, Plate 138

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 1°.
• Contains one regular 12-pointed star polygon with vertex angle of 66°.
• Contains one regular 20-pointed star polygon with vertex angle of 54°.
• There are 10 non-regular reflective tiles (including 2 kites) and four reflective pairs.
• The tiling satisfies the interlace condition and has three finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 1137 polygons.

1. Plate 60 (al-Fadawiyya, Cairo, Egypt. Dome) from [bour0] (1479-81AD, 884-6AH)
2. Fig 7.2a from [ww]
3. Page 268 from [abas]
4. Plate 138 from [bourgoin]

• Wade photo BOU 138

• Large stars

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