Prisms are another common type of polyhedron. A prism has two parallel bases, upper and lower, which are congruent polygons. Like pyramids, prisms get their names from the shape of their bases. If lateral sides of a prism are perpendicular to the bases, as in the case of a triangular, quadrilateral, hexagonal, and rectangular prisms, they are rectangles. Such a prism is called a right prism. A rectangular prism, which modeled by a box, is the most common type of prism. If some of the lateral faces of a prism are parallelograms that are not rectangles, as in the pentagonal prism, the prism is called oblique prism. The union of a prism and its interior is called a solid prism. A rectangular prism that is a solid is sometimes called a rectangular solid.

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