In geometry, the pentagonal antiprism is the third in an infinite set of antiprisms formed by an even-numbered sequence of triangle sides closed by two polygon caps.

If faces are all regular, it is a semiregular polyhedron.

See also

• Set of antiprisms
• Octahedron Triangle-capped antiprism
• Square antiprism
• Hexagonal antiprism
• Octagonal antiprism

Prismatoid polyhedra