The parallel faces of a prism are called

Bases

Step-by-step explanation:

The parallel faces of a prism are referred to as bases.

A prism is a solid figure (meaning it has a volume) that contains two parallel faces called bases which are stretched at a certain distance apart which is called the height.

These faces are polygons and are n-sided.

It is the shape of these parallel faces called bases that are used to name the prism. Thus, a prism with two pentagons as the parallel faces is called a pentagonal prism and so on.