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|Elongated pentagonal pyramid|
J8 - J9 - J10
|Symmetry group||C5v, , (*55)|
|Rotation group||C5, +, (55)|
In geometry, the elongated pentagonal pyramid is one of the Johnson solids (J9). As the name suggests, it can be constructed by elongating a pentagonal pyramid (J2) by attaching a pentagonal prism to its base.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
The dual of the elongated pentagonal pyramid has 11 faces: 5 triangular, 1 pentagonal and 5 trapezoidal.
|Dual elongated pentagonal pyramid||Net of dual|