| Decagrammic prism | |
|---|---|
 | |
| Type | Uniform polyhedron |
| Faces | 2 Decagrams 10 squares |
| Edges | 30 |
| Vertices | 20 |
| Vertex configuration | 10/3.4.4 |
| Wythoff symbol | 2 10/3 | 2 |
| Symmetry group | D10h, [2,10],(*2.10.10), order 40 |
| Dual polyhedron | Decagrammic bipyramid |
| Properties | nonconvex |
| Vertex figure | |
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In geometry, the decagrammic prism is one of an infinite set of nonconvex prisms formed by squares sides and two regular star polygon caps, in this case two decagrams.
It has 12 faces (10 squares and 2 decagrams), 30 edges, and 20 vertices.