Al-Ghiyasiyya madrasah, Khargird

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 36°.
• 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 108°.
• There are five non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 319 polygons.

1. Page 89, right (Al-Ghiyasiyya madrasah, Khargird, Iran) of Bernard O'Kane. The Madrasa Al-Ghiyās̱īyya at Khargird, Iran, Vol. 14, 1976. [okane] {} Available on Internet.(1447AD, 850AH)

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