Elongated pentagonal bipyramid

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Elongated pentagonal bipyramid
Elongated pentagonal dipyramid.png
Type Johnson
J15 - J16 - J17
Faces 10 triangles
5 squares
Edges 25
Vertices 12
Vertex configuration 10(32.42)
2(35)
Symmetry group D5h, [5,2], (*522)
Rotation group D5, [5,2]+, (522)
Dual polyhedron Pentagonal bifrustum
Properties convex
Net
Johnson solid 16 net.png

In geometry, the elongated pentagonal bipyramid is one of the Johnson solids (J16). As the name suggests, it can be constructed by elongating a pentagonal bipyramid (J13) by inserting a pentagonal prism between its congruent halves.

A Johnson solid is one of 92 strictly convex polyhedra that have regular faces but are not uniform (that is, they are not Platonic solids, Archimedean solids, prisms, or antiprisms). They were named by Norman Johnson, who first listed these polyhedra in 1966.[1]

Dual polyhedron[edit]

The dual of the elongated square bipyramid is a pentagonal bifrustum.

See also[edit]

External links[edit]


  1. ^ Johnson, Norman W. (1966), "Convex polyhedra with regular faces", Canadian Journal of Mathematics, 18: 169–200, doi:10.4153/cjm-1966-021-8, MR 0185507, Zbl 0132.14603 .