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.
The solid figure you are describing is a prism. A prism has two congruent polygonal bases that are parallel and connected by rectangular lateral faces. The shape of the prism is determined by the type of polygon used for the bases, such as a triangular prism or a rectangular prism. Each lateral face is a rectangle that connects corresponding sides of the two bases.
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 term "lateral face" typically refers to the side surfaces of a three-dimensional geometric shape, such as a prism or a pyramid, that are not the base or top surfaces. In the context of polyhedra, lateral faces are the flat surfaces that connect the top and bottom faces. For example, in a rectangular prism, the lateral faces are the four side rectangles.
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.