Type Star bipyramid Edges 15 Schläfli symbol {} + {5/2} | Faces 10 triangles Vertices 7 | |
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Symmetry group D5h, [5,2], (*225), order 20 | ||
In geometry, the pentagrammic bipyramid (or dipyramid) is first of the infinite set of face-transitive star bipyramids containing star polygon arrangement of edges. It has 10 intersecting isosceles triangle faces. It is topologically identical to the pentagonal bipyramid.
Each star bipyramid is the dual of a star polygon based uniform prism.
Related polyhedra
There are two pentagrammic trapezohedra (or deltohedra), being dual to the pentagrammic antiprism and pentagrammic crossed antiprism respectively, each having intersecting kite-shaped faces (convex or concave), and a total of 12 vertices:
References
Pentagrammic bipyramid Wikipedia(Text) CC BY-SA