It is a polyhedron that has two opposite bases that are congruent and parallel. Its lateral faces are rectangles.

Sagot :

A prism is a three-dimensional solid figure with two parallel faces, called bases, that are congruent polygons, and lateral flat faces which are rectangles in a right prism, and are parallelograms in an oblique prism. Prisms are also called polyhedra since their faces are polygons. ... The lateral faces are parallelograms.