In geometry, the gyroelongated pyramids (also called augmented antiprisms) are an infinite set of polyhedra, constructed by adjoining an n-gonal pyramid to an n-gonal antiprism.

There are two gyroelongated pyramids that are Johnson solids made from regular triangles and square, and pentagons.

A triangular and hexagonal form can be constructed with coplanar faces.

Others can be constructed allowing for isosceles triangles.

This polyhedron-related article is a stub.