Heptagonal retroprism
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Heptagonal retroprism | |
---|---|
Rank | 3 |
Type | Isogonal |
Elements | |
Faces | 14 isosceles triangles, 2 heptagons |
Edges | 14+14 |
Vertices | 14 |
Vertex figure | Crossed isosceles trapezoid |
Related polytopes | |
Army | Hep |
Regiment | * |
Dual | Heptagonal concave antitegum |
Conjugates | Heptagrammic antiprism, great heptagrammic retroprism |
Abstract & topological properties | |
Euler characteristic | 2 |
Orientable | Yes |
Genus | 0 |
Properties | |
Symmetry | I2(7)×A1, order 28 |
Convex | No |
Nature | Tame |
The heptagonal retroprism, also called the heptagonal crossed antiprism, is a prismatic isogonal polyhedron. It consists of 2 base heptagons and 14 isosceles triangles. Each vertex joins one heptagon and three triangles. It is a crossed antiprism based on a heptagon, seen as a 7/6-gon rather than 7/1. It cannot be made uniform.
It is isomorphic to the heptagonal antiprism.
Related polyhedra[edit | edit source]
There are an infinite amount of prismatic isogonal compounds that are the crossed antiprisms of compounds of heptagons.
External links[edit | edit source]
- Klitzing, Richard. "n/d-ap".