| Enneagrammic prism (9/4) | |
|---|---|
| Type | Uniform polyhedron |
| Faces | 2 enneagrams 9 squares |
| Edges | 27 |
| Vertices | 18 |
| Vertex configuration | 9/4.4.4 |
| Wythoff symbol | 2 9/4 | 2 |
| Symmetry group | D9h |
| Dual polyhedron | Enneagrammic bipyramid |
| Properties | nonconvex |
| Vertex figure | |
In geometry, the {9/4} enneagrammic prism is one of an infinite set of nonconvex prisms formed by squares sides and two regular star polygon caps, in this case two {9/4} enneagrams.