Cubical bipyramid explained

bgcolor=#e7dcc3 colspan=3	Cubic bipyramid
align=center colspan=3	Orthographic projection 8 red vertices and 12 blue edges of central cube, with 2 yellow apex vertices.
Type	Polyhedral bipyramid
Schläfli symbol	+ dt
Coxeter-Dynkin
Cells	12 ∨ (2×6)
Faces	30 triangles (2×12+6)
Edges	28 (2×8+12)
Vertices	10 (2+8)
Dual	Octahedral prism
Symmetry group	[2,4,3], order 96
Properties	convex, regular-faced,CRF polytope, Hanner polytope

In 4-dimensional geometry, the cubical bipyramid is the direct sum of a cube and a segment, + . Each face of a central cube is attached with two square pyramids, creating 12 square pyramidal cells, 30 triangular faces, 28 edges, and 10 vertices. A cubical bipyramid can be seen as two cubic pyramids augmented together at their base.^[1]

It is the dual of a octahedral prism.

Being convex and regular-faced, it is a CRF polytope.

Coordinates

It is a Hanner polytope with coordinates:^[2]

• [2] (0, 0, 0; ±1)
• [8] (±1, ±1, ±1; 0)

See also

• Tetrahedral bipyramid
• Dodecahedral bipyramid
• Icosahedral bipyramid

External links

• Cubic tegum

Notes and References

1. Web site: Cute .
2. Web site: Hanner polytopes .