Definition:Triangular Bipyramid
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Definition
A triangular bipyramid is a polyhedron formed by taking two regular tetrahedra and placing their bases together:
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.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $8$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $8$
- Weisstein, Eric W. "Triangular Dipyramid." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TriangularDipyramid.html