|Set of elongated bipyramids|
|Symmetry group||Dnh, [n,2], (*n22)|
|Rotation group||Dn, [n,2]+, (n22)|
There are three elongated bipyramids that are Johnson solids made from regular triangles and squares. Higher forms can be constructed with isosceles triangles.
|Dual||triangular bifrustum||square bifrustum||pentagonal bifrustum||hexagonal bifrustum|
- Norman W. Johnson, "Convex Solids with Regular Faces", Canadian Journal of Mathematics, 18, 1966, pages 169–200. Contains the original enumeration of the 92 solids and the conjecture that there are no others.
- Victor A. Zalgaller (1969). Convex Polyhedra with Regular Faces. Consultants Bureau. No ISBN. The first proof that there are only 92 Johnson solids.