All the faces of a triangular prism must be flat. So finding them should not be too difficult!
A prism has no curved surfaces. It has 5 or more flat faces.
The flat surfaces of all polyhedra are called faces and a rectangular prism is simply one kind of polyhedron.
Faces
There are five of them.
6
Two flat faces (one at either end of the prism), and a curved side.
It has 6 faces which are its flat surfaces.
A triangular prism has two triangular faces and three rectangular ones.
flat surfaces on any polyhedron are called faces
A minimum of 5, no maximum.
It has 5 SIDES