A prism is a
solid shape whose cross-sections parallel to an end are all identical.
In every case the volume V of the prism is equal to the
area of its cross-section A multiplied by its height h:

V = Ah

Prism is a polyhedron
made of an n-sided polygonal base, a translated copy, and n faces
joining corresponding sides. Thus these joining faces are parallelograms.
All cross-sections parallel to the base faces are the same. A prism
is a subclass of the prismatoids.