Decahedron
In geometry, a decahedron is a polyhedron with ten faces. There are 32300 topologically distinct decahedra, and none are regular, so this name does not identify a specific type of polyhedron except for the number of faces.
Some decahedra have regular faces:
Octagonal prism (uniform 8-prism)
Square antiprism (uniform 4-antiprism)
Square cupola (Johnson solid 4)
Pentagonal bipyramid (Johnson solid 13, 5-bipyramid)
Augmented pentagonal prism (Johnson solid 52)
The decahedra with irregular faces include:
Pentagonal trapezohedron (5-trapezohedron, antiprism dual) – often used as a die in role playing games, known as a d10
Truncated square trapezohedron
Enneagonal pyramid (9-pyramid)
Ten of diamonds decahedron - a space-filling polyhedron with D2d symmetry.
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