In geometry, the decagrammic antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two decagrams.

Decagrammic antiprism
TypeUniform polyhedron
Faces2 Decagrams
20 triangles
Edges40
Vertices20
Vertex configuration103.3.3.3
Wythoff symbol-2 2 103
Symmetry groupD10d, [2+,20], (2*10), order 40
Dual polyhedronDecagrammic deltohedron
Propertiesnonconvex
Vertex figure
3D model of a (uniform) decagrammic antiprism

See also

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  • Weisstein, Eric W. "Antiprism". MathWorld.
  • Paper models of prisms and antiprisms