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Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are pentagons.

Pentagonal Bipyramid

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are pentagons.

Pentagonal Bipyramid

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…