Elongated bipyramid

Set of elongated bipyramids

Faces2n triangles,
n squares
Edges5n
Vertices2n+2
Symmetry groupDnh, [n,2], (*n22)
Rotation groupDn, [n,2]+, (n22)
Dual polyhedronbifrustums
Propertiesconvex

In geometry, the elongated bipyramids are an infinite set of polyhedra, constructed by elongating an n-gonal bipyramid (by inserting an n-gonal prism between its congruent halves).

There are three elongated bipyramids that are Johnson solids made from regular triangles and squares. Higher forms can be constructed with isosceles triangles.

Forms

Name J14 J15 J16 elongated
hexagonal
bipyramid
Type Equilateral Irregular
Image
Faces 6 triangles,
3 squares
8 triangles,
4 squares
10 triangles,
5 squares
12 triangles,
6 squares
Dual triangular bifrustum square bifrustum pentagonal bifrustum hexagonal bifrustum

See also

References

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