It is a polyhedron with two congruent faces: nothing more, nothing less. That can change if several additional conditions are required of the polyhedron.
A cylinder would fit the given description
A triangular prism is a polyhedron comprising two congruent and parallel triangles, attached to one another by three rectangular faces.
A prism has two congruent parallel bases.
That would be classified as an edge.
A Prismthe faces are called bases
A polyhedron that has 2 congruent faces is a PRISM. To be a prism, all the other sides (not including the 2 that are congruent) have to be 4-sided.
It is a polyhedron with two congruent faces: nothing more, nothing less. That can change if several additional conditions are required of the polyhedron.
Parallelogram prism
Any regular polygon has two congruent faces. Many polygons have two or more congruent faces.
A cylinder would fit the given description
There are many, but the infinitely many types of prisms are probably the simplest.
There are infinitely many such polyhedra. A regular dodecahedron, for example.
rectangular prism triangular prism
It is a polyhedron with two congruent sides: nothing more, nothing less.
Prism, which a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms.
A polyhedron with two congruent triangles. There are very many possible configurations.