A five-armed spiral based on a tile from a 20-gon has twenty points

• The tiling has no symmetry group and hence is not a repeat pattern.
• All the internal angles of the constituent polygons are a multiple of 18°.
• There are one non-regular reflective pairs and no tiles with no mirror image.
• The tiling is edge-to-edge.
• As drawn, contains about 240 polygons.

• Figure 4 of Paul Gailiunas. Spiral Tilings, Visual Mathematics, 2000. [gailiunas] {Vol 2, No 3} Available on Internet.

• Tiling whose angles are a multiple of 18°

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