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Heptagrammic-order heptagonal tiling : ウィキペディア英語版 | Heptagrammic-order heptagonal tiling
In geometry, the Heptagrammic-order heptagonal tiling is a regular star-tiling of the hyperbolic plane. It has Schläfli symbol of . The vertex figure heptagrams are , 40px. The heptagonal faces overlap with density 3. == Related tilings== It has the same vertex arrangement as the regular order-7 triangular tiling, . The full set of edges coincide with the edges of a heptakis heptagonal tiling. :160px160px It is related to a Kepler-Poinsot polyhedron, the great dodecahedron, , which is polyhedron and a density-3 regular star-tiling on the sphere: :240px
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