Elongated pentagonal cupola
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| Elongated pentagonal cupola | |
|---|---|
 |
|
| Type | Johnson J19 - J20 - J21 |
| Faces | 5 triangles 15 squares 1 pentagon 1 decagon |
| Edges | 45 |
| Vertices | 25 |
| Vertex configuration | - |
| Symmetry group | C5v |
| Dual polyhedron | - |
| Properties | convex |
In geometry, the elongated pentagonal cupola is one of the Johnson solids (J20). As the name suggests, it can be constructed by elongating a pentagonal cupola (J5) by attaching a decagonal prism to its base. The solid can also be seen as a elongated pentagonal orthobicupola (J38) with its "lid" (another pentagonal cupola) removed.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
