Two Polygons, PP Class 19, [cmm,d2,d2], IH Class 17.

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• There is one non-regular reflective tile.
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• The tiling satisfies the two-polygon condition.
• As drawn, contains about 33 polygons.

• PP Class 19, [cmm,d2,d2], IH Class 17 of S J Dawes and B A Wichmann. A New Class of Tilings with Two Prototiles, Visual Mathematics, Vol 3, No 4., 2001. [dawes] {Revises CD/booklet.}

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