| Type: | Uniform polyhedron |
| Faces: | 2 Decagrams 10 squares |
| Edges: | 30 |
| Vertices: | 20 |
| Wythoff: | 2 10/3 | 2 |
| Symmetry: | D10h, [2,10],(*2.10.10), order 40 |
| Vertex Config: | 10/3.4.4 |
| Dual: | Decagrammic bipyramid |
| Properties: | nonconvex |
| Vertex Figure: | Decagrammic prism-3-10 vertfig.png |
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.