Icosahedral bipyramid explained

bgcolor=#e7dcc3 colspan=3Icosahedral bipyramid
align=center colspan=3
Orthogonal projection
Central icosahedron with 30 blue edges and 20 red vertices, apex vertices in yellow, connecting to icosahedron with 24 black edges.
TypePolyhedral bipyramid
Schläfli symbol +
dt
Coxeter-Dynkin
Cells
Faces80
Edges54 (30+12+12)
Vertices14 (12+2)
DualDodecahedral prism
Symmetry group[2,3,5], order 240
Propertiesconvex, regular-celled, Blind polytope
In 4-dimensional geometry, the icosahedral bipyramid is the direct sum of a icosahedron and a segment, + . Each face of a central icosahedron is attached with two tetrahedra, creating 40 tetrahedral cells, 80 triangular faces, 54 edges, and 14 vertices.[1] An icosahedral bipyramid can be seen as two icosahedral pyramids augmented together at their bases.

It is the dual of a dodecahedral prism, Coxeter-Dynkin diagram, so the bipyramid can be described as . Both have Coxeter notation symmetry [2,3,5], order 240.

Having all regular cells (tetrahedra), it is a Blind polytope.

See also

External links

Notes and References

  1. Web site: Ite .