Rigby, figure 2

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 25.71 (π/7)°.
• Contains two regular two-pointed star polygons with vertex angle of 77.14 (3π/7)°.
• Contains one regular 14-pointed star polygon with vertex angle of 77.14 (3π/7)°.
• There are five non-regular reflective tiles (including 2 kites) and two reflective pairs.
• 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 344 polygons.

1. Other Islamic Patterns (From John Rigby in letter dated 9th December 1994) of B A Wichmann. The World of Patterns, World Scientific, 2001. ISBN 981024619. [wich2] {Only new patterns ascribed to this.}

• Tilings not constructible by straightedge and compass

Photo?

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