Square cupola

Square cupola
Type	Johnson J3 – J4 – J5
Faces	4 triangles 5 squares 1 octagon
Edges	20
Vertices	12
Vertex configuration	${\displaystyle 8\times (3\times 4\times 8)+4\times (3\times 4^{3})}$
Symmetry group	${\displaystyle C_{4v}}$
Properties	convex
Net

In geometry, the square cupola (sometimes called lesser dome) is a cupola with an octagonal base. In the case of all edges being equal in length, it is a Johnson solid, a convex polyhedron with regular faces. It can be used to construct many other polyhedrons, particularly other Johnson solids.