All cross-sections parallel to the base faces are the same triangle.Īs a semiregular (or uniform) polyhedron Ī right triangular prism is semiregular or, more generally, a uniform polyhedron if the base faces are equilateral triangles, and the other three faces are squares. Use the surface area of a pyramid formula to find the surface area of a regular triangular pyramid with a base area of 1.73 square inches, a base side length of 2 inches, and a slant. A uniform triangular prism is a right triangular prism with equilateral bases, and square sides.Įquivalently, it is a polyhedron of which two faces are parallel, while the surface normals of the other three are in the same plane (which is not necessarily parallel to the base planes). A right triangular prism has rectangular sides, otherwise it is oblique.
In geometry, a triangular prism is a three-sided prism it is a polyhedron made of a triangular base, a translated copy, and 3 faces joining corresponding sides. For the optical prism, see Triangular prism (optics).