Dodecahedral bipyramid explained

bgcolor=#e7dcc3 colspan=3	Decahedral bipyramid
align=center colspan=3	Ortogonal projection The 20 central dodecahedron vertices are shown in red, with 2 apex vertices in yellow.
Type	Polyhedral bipyramid
Schläfli symbol	+ dt
Coxeter-Dynkin
Cells
Faces	60 Isosceles triangles 12 pentagons
Edges	70 (30+20+20)
Vertices	22
Dual	Icosahedral prism
Symmetry group	[2,5,3], order 240
Properties	convex, isochoric

In 4-dimensional geometry, the dodecahedral bipyramid is the direct sum of a dodecahedron and a segment, + . Each face of a central dodecahedron is attached with two pentagonal pyramids, creating 24 pentagonal pyramidal cells, 72 isosceles triangular faces, 70 edges, and 22 vertices. A dodecahedral bipyramid can be seen as two dodecahedral pyramids augmented together at their base.

It is the dual of a icosahedral prism.

See also

• Tetrahedral bipyramid
• Cubic bipyramid
• Icosahedral bipyramid

External links

• Dodecahedral tegum