Elongated square pyramid

In geometry, the elongated square pyramid is a convex polyhedron constructed from a cube by attaching an equilateral square pyramid onto one of its faces. It is an example of Johnson solid. It is topologically (but not geometrically) self-dual.

Elongated square pyramid
Type	Johnson J7 – J8 – J9
Faces	4 triangles 1+4 squares
Edges	16
Vertices	9
Vertex configuration	${\displaystyle {\begin{aligned}4\times (4^{3})&+\\1\times (3^{4})&+\\4\times (3^{2}\times 4^{2})\end{aligned}}}$
Symmetry group	${\displaystyle C_{4v}}$
Dual polyhedron	self-dual
Properties	convex
Net