Heptagonal bipyramid
The heptagonal bipyramid is one of the infinite set of bipyramids, dual to the infinite prisms. If an heptagonal bipyramid is to be face-transitive, all faces must be isosceles triangles.The resulting solid has 14 triangular faces, 9 vertices and 21 edges.[1][2]
| Heptagonal bipyramid | |
|---|---|
 | |
| Type | bipyramid |
| Faces | 14 triangles |
| Edges | 21 |
| Vertices | 9 |
| Schläfli symbol | { } + {7} |
| Coxeter diagram |     |
| Symmetry group | D7h, [7,2], (*227), order 28 |
| Rotation group | D7, [7,2]+, (227), order 14 |
| Dual polyhedron | heptagonal prism |
| Face configuration | V4.4.7 |
| Properties | convex, face-transitive |
Related polyhedra
| Polyhedron |  |
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|---|---|---|---|---|---|---|---|---|---|
| Coxeter | |
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| Tiling |  |
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| Config. | V2.4.4 | V3.4.4 | V4.4.4 | V5.4.4 | V6.4.4 | V7.4.4 | V8.4.4 | V9.4.4 | V10.4.4 |
References
- Heptagonal Dipyramid dmccooey.com [2014-6-23]
- Pugh, Anthony (1976), Polyhedra: A Visual Approach, University of California Press, pp. 21, 27, 62, ISBN 9780520030565.
External links
- Weisstein, Eric W. "Dipyramid". MathWorld.
- Virtual Reality Polyhedra The Encyclopedia of Polyhedra
- VRML models <7>
- Conway Notation for Polyhedra Try: dP7
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