Prism and Pyramid
A prism is a three-dimensional geometric structure with two bases, which are often polygonal, and three or more lateral faces, which are rectangular in shape. A prism’s sides are all perpendicular to the bases, and its lateral faces are all parallelograms. The shape of a prism’s base determines its name. For instance, the base of a triangular prism is triangular, while the base of a rectangular prism is rectangular.
A pyramid is a three-dimensional geometric shape that has a base, which is usually a polygon, and triangular faces called lateral faces that meet at a single point called the apex. The sides of a pyramid are all triangles, and the lateral faces of a pyramid are all congruent isosceles triangles. Pyramids are also named based on the shape of their base. For example, a triangular pyramid has a triangular base, and a square pyramid has a square base.