Definition:Triangular Bipyramid

Definition
A triangular bipyramid is a polyhedron formed by taking two regular tetrahedra and placing their bases together:


 * TriangularBipyramid.png

The triangular bipyramid is an example of a deltahedron.

Also defined as
A triangular bipyramid can also be defined as the bipyramid formed by placing general non-regular tetrahedra (with congruent bases) together, but this is rarely seen.

Also known as
The term triangular dipyramid can be found at least as frequently as triangular bipyramid.