Akber, V&A freehand sketch

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 18°.
• Contains one regular two-pointed star polygon with vertex angle of 36°.
• Contains one regular four-pointed star polygon with vertex angle of 54°.
• There is one non-regular reflective tile and two tiles with no mirror image.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 139 polygons.

• Freehand sketch of Mirza Akber. Persian decoration of Mirza Akber, Victoria and Albert Museum, NAL, 1898. [akber] {Pressmark VA.1898.0001}

• Wade photo MA 012

• Tiling whose angles are a multiple of 18°

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