Decahedron

For the Washington, DC post-hardcore band, see Decahedron (band)

In geometry, a decahedron is a polyhedron with 10 faces. There are many such polyhedra and none are regular, so this name is ambiguous.

Convex decahedra made out of regular polygons include: Octagonal prism (Uniform 8-prism)
Square antiprism (Uniform 4-antiprism)
Square cupola (Johnson solid 4)
Pentagonal dipyramid (Johnson solid 13, 5-bipyramid)
Augmented pentagonal prism (Johnson solid 52)

With nonregular faces it can also be: Pentagonal trapezohedron (5-trapezohedron, antiprism dual)
Enneagonal pyramid (9-pyramid)

A very important decahedron, for its use in role playing games to simulate probabilities, is the Pentagonal trapezohedron, usually known by d10.

Translation of "Decahedron"

German: Dekaeder, Spanish: Decaedro, Esperanto: Dekedro, Thai: ทรงสิบหน้า.