Gyroelongated pentagonal pyramid
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| Gyroelongated pentagonal pyramid | |
|---|---|
 |
|
| Type | Johnson J10 - J11 - J12 |
| Faces | 15 triangles 1 pentagon |
| Edges | 25 |
| Vertices | 11 |
| Vertex configuration | 6 of 35 5 of 33.5 |
| Symmetry group | C5v |
| Dual | - |
| Properties | convex |
In geometry, the gyroelongated pentagonal pyramid is one of the Johnson solids (J11). As its name suggests, it is formed by taking a pentagonal pyramid and "gyroelongating" it, which in this case involves joining a pentagonal antiprism to its base. It can also be seen as an icosahedron with the top (a pentagonal pyramid, J2) chopped off by a plane.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
