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From G & S, page 373. For construction, see BASIC program

This pattern is a member of an interesting class of mathematical patterns.

FROM: TILINGS AND PATTERNS by Branko Grünbaum and G. C. Shephard © 1987 by W. H. Freeman and Company. Used with permission. PP Class 45, [p3lm,c3,d3], IH Class 18.

Statistics on this tiling:

- Tiling has symmetry
*p31m*. - Tiling has 3 polygons and 24 edges.
- Edges are completely connected.
- Tiling is not edge-to-edge.
- Tiling satisfies the two-polygon condition.
- Internal angles a multiple of 30°.
- Contains 3 non-regular polygons of which all have reflective symmetry but none are the reflection of others.
- Tiling contains 247 polygons.