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.
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 231 polygons.

• From Tony Lee (Cairo, mausoleum of Shaikh Abu Shibak, South door, Egypt) from [pc]
• Plate 180 from [bourgoin]
• Page 323 from [abas]
• Figure 25 (Same type of pattern but with a different vertex angle) from [lee]

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• Wade photo BOU 180

• Tiling whose angles are a multiple of 18°

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