rectangle
The lateral faces of a prism - pentagonal or other - are rectangular.
4 lateral faces
Triangle
A rectangular prism.... has four rectangular, and two square faces.
This depends on whether or not the prism is a rectangular prism or not. Simple shape prisms (rectangular, triangle, octagonal, hexagonal) all have rectangular faces.
-3
Rectangular !!!
A rectangular prism has six faces. Four of these must be rectangular: the other two may be square or rectangular.
The lateral faces of a prism are either squares, rectangles or parallelograms. If the prism is oblique then the faces must be parallelograms and not rectangles or squares.
The shape you are describing is a cylinder. A cylinder has two circular faces, which are also known as bases, and one rectangular face, which is called the lateral face. The lateral face of a cylinder is formed by unrolling the curved surface of the cylinder into a flat shape, creating a rectangle.
A cube, a rectangular prism and a pentagonal pyramid
There are a total of 6 faces on a rectangular prism. Each side is a rectangle. (Try looking up a picture, it will help you visualize it)