Type bipyramid Edges 21 Schläfli symbol { } + {7} | Faces 14 triangles Vertices 9 | |
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Symmetry group D7h, [7,2], (*227), order 28 | ||
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.
References
Heptagonal bipyramid Wikipedia(Text) CC BY-SA