Dodecahedral bipyramid
# Dodecahedral bipyramid

Decahedral bipyramid :

| Ortogonal projection The 20 central dodecahedron vertices are shown in red, with 2 apex vertices in yellow. |||
| - | - | - |
| Type | Polyhedral bipyramid |
| Schläfli symbol | {5,3} + { } dt{2,3,5} |
| Coxeter-Dynkin | |
| Cells | 24 {5}∨{ } |
| Faces | 60 Isosceles triangles 12 pentagons |
| Edges | 70 (30+20+20) |
| Vertices | 22 |
| Dual | Icosahedral prism |
| Symmetry group | [2,5,3], order 240 |
| Properties | convex, isochoric |

In 4-dimensional geometry, the dodecahedral bipyramid is the direct sum of a dodecahedron and a segment, {5,3} + { }. Each face of a central dodecahedron is attached with two pentagonal pyramids, creating 24 pentagonal pyramidal cells, 72 isosceles triangular faces, 70 edges, and 22 vertices. A dodecahedral bipyramid can be seen as two dodecahedral pyramids augmented together at their base.

It is the dual of a icosahedral prism.

