Pentagonal bipyramid
In geometry, the pentagonal bipyramid (or dipyramid) is third of the infinite set of face-transitive bipyramids, and the 13th Johnson solid (J13). Each bipyramid is the dual of a uniform prism.
| Pentagonal bipyramid | |
|---|---|
| Type | Bipyramid, Johnson J12 – J13 – J14 |
| Faces | 10 triangles |
| Edges | 15 |
| Vertices | 7 |
| Vertex configuration | V4.4.5 |
| Schläfli symbol | { } + {5} |
| Coxeter diagram | |
| Symmetry group | D5h, [5,2], (*225), order 20 |
| Rotation group | D5, [5,2]+, (225), order 10 |
| Dual polyhedron | pentagonal prism |
| Properties | convex, face-transitive, (deltahedron) |
| Net | |
Although it is face-transitive, it is not a Platonic solid because some vertices have four faces meeting and others have five faces.
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