This means that a triangular prism has regular faces and has an isogonal symmetry on vertices. More generally, the triangular prism is uniform. A semiregular prism means that the number of its polygonal base's edges equals the number of its square faces. If the base is equilateral and the lateral faces are square, then the right triangular prism is semiregular. This prism may also be considered a special case of a wedge. If the prism's edges are perpendicular to the base, the lateral faces are rectangles, and the prism is called a right triangular prism. These edges form 3 parallelograms as other faces. The triangle has 3 vertices, each of which pairs with another triangle's vertex, making up another 3 edges. Every prism has 2 congruent faces known as its bases, and the bases of a triangular prism are triangles. Examples are some of the Johnson solids, the truncated right triangular prism, and Schönhardt polyhedron.Ī triangular prism has 6 vertices, 9 edges, and 5 faces. The triangular prism can be used in constructing another polyhedron. A right triangular prism may be both semiregular and uniform. If the edges pair with each triangle's vertex and if they are perpendicular to the base, it is a right triangular prism. In geometry, a triangular prism or trigonal prism is a prism with 2 triangular bases. For the optical prism, see Triangular prism (optics).
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