Encyclopedia > Bipyramid

  Article Content


A bipyramid is a polyhedron formed by joining two identical pyramids base-to-base. The bipyramids are the dual polyhedra of the prisms. Three bipyramids can be made out of all regular triangles, the octahedron (square bipyramid), which counts among the Platonic solids, and the triangular and pentagonal bipyramids, which count among the Johnson solids.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article

... without a legitimate basis of authority. The first to have the title of "Tyrant" was Pisistratus in 560 BC. In modern times Tyrant has come to mean a dictator who ...

This page was created in 33.4 ms