| Elongated pentagonal bipyramid | |
|---|---|
| Type | Johnson J15 - J16 - J17 |
| Faces | 10 triangles 5 squares |
| Edges | 25 |
| Vertices | 12 |
| Vertex configuration | 10(32.42) 2(35) |
| Symmetry group | D5h |
| Dual polyhedron | Pentagonal bifrustum |
| Properties | convex |
In geometry, the elongated pentagonal bipyramid is one of the Johnson solids (J16). As the name suggests, it can be constructed by elongating a pentagonal bipyramid (J13) by inserting a pentagonal prism between its congruent halves.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
The dual of the elongated square bipyramid is a pentagonal bifrustum.