| Set of elongated dipyramids | |
|---|---|
 | |
| Faces | 2n triangles, n squares |
| Edges | 5n |
| Vertices | 2n+2 |
| Symmetry group | Dnh |
| Dual polyhedron | bifrustums |
| Properties | convex |
In geometry, the elongated dipyramids are an infinite set of polyhedra, constructed by elongating an n'-agonal bipyramid (by inserting an n-agonal prism between its congruent halves).
There are three elongated dipyramids that are Johnson solids made from regular triangles and squares. Higher forms can be constructed with isosceles triangles.
Forms
- Elongated triangular dipyramid (J14) - 6 triangles, 3 squares - dual Triangular bifrustum
- Elongated square dipyramid (J15) - 8 triangles, 4 squares - dual Square bifrustum
- Elongated pentagonal dipyramid (J16) - 10 triangles, 5 squares - dual Pentagonal bifrustum
- Elongated hexagonal dipyramid - 12 triangles, 6 squares - dual Hexagonal bifrustum
- ...
- n-agonal elongated dipyramid - 2n triangles, n squares - duals bifrustums
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