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.
Decagrammic prism | |
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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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![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Decagrammic_prism.stl/220px-Decagrammic_prism.stl.png)
It has 12 faces (10 squares and 2 decagrams), 30 edges, and 20 vertices.