Decagrammic prism

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
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

3D model of a (uniform) decagrammic prism.

It has 12 faces (10 squares and 2 decagrams), 30 edges, and 20 vertices.