The octagonal bipyramid is one of the infinite set of

bipyramid A (symmetric) -gonal bipyramid or dipyramid is a polyhedron formed by joining an -gonal pyramid and its mirror image base-to-base. An -gonal bipyramid has triangle faces, edges, and vertices. The "-gonal" in the name of a bipyramid does not ...

s, dual to the infinite prisms. If an octagonal bipyramid is to be

face-transitive In geometry, a tessellation of dimension (a plane tiling) or higher, or a polytope of dimension (a polyhedron) or higher, is isohedral or face-transitive if all its faces are the same. More specifically, all faces must be not merely congruent ...

, all faces must be

isosceles triangle In geometry, an isosceles triangle () is a triangle that has two sides of equal length. Sometimes it is specified as having ''exactly'' two sides of equal length, and sometimes as having ''at least'' two sides of equal length, the latter versio ...

s. 16-sided dice are often octagonal bipyramids.

Images

It can be drawn as a tiling on a sphere which also represents the fundamental domains of ,2 *422 symmetry: : Spherical_octagonal_bipyramid

Related polyhedra

External links

*
Virtual Reality Polyhedra
The Encyclopedia of Polyhedra **

VRML VRML (Virtual Reality Modeling Language, pronounced ''vermal'' or by its initials, originally—before 1995—known as the Virtual Reality Markup Language) is a standard file format for representing 3-dimensional (3D) interactive vector graphi ...

model
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Try: dP8 Polyhedra {{Polyhedron-stub