Octagrammic crossed-antiprism
Polyhedron with 18 faces
| Octagrammic crossed-antiprism | |
|---|---|
 | |
| Type | Uniform polyhedron |
| Faces | 2 {8/3} 16 {3} |
| Edges | 32 |
| Vertices | 16 |
| Vertex configuration | 8/5.3.3.3 |
| Wythoff symbol | |2 2 8/5 |
| Schläfli symbol | s{2,16/5} |
| Coxeter diagram |       |
| Symmetry group | D8d, [2+,16],(2*8), order 32 |
| Dual polyhedron | Octagrammic concave deltohedron |
| Properties | nonconvex |
| Vertex figure | |
 | |
In geometry, the octagrammic crossed-antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two octagrams.
See also
- Prismatic uniform polyhedron
- Octagrammic antiprism
External links
Wikimedia Commons has media related to Antiprisms.
- Weisstein, Eric W. "Antiprism". MathWorld.
- Paper models of prisms and antiprisms
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Convex polyhedra
- triakis tetrahedron
- rhombic dodecahedron
- triakis octahedron
- tetrakis hexahedron
- deltoidal icositetrahedron
- disdyakis dodecahedron
- pentagonal icositetrahedron
- rhombic triacontahedron
- triakis icosahedron
- pentakis dodecahedron
- deltoidal hexecontahedron
- disdyakis triacontahedron
- pentagonal hexecontahedron
| |
| duals: | |
|---|---|
- pyramids
- truncated trapezohedra
- gyroelongated bipyramid
- cupola
- bicupola
- frustum
- bifrustum
- rotunda
- birotunda
- prismatoid
- scutoid
Degenerate polyhedra are in italics.
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