A triangular prism is a three-dimensional geometric shape with two parallel triangular bases and three rectangular faces connecting the corresponding sides of the triangles. The shape is classified as a polyhedron, specifically a type of prism, where the cross-section along its length remains constant. The volume of a triangular prism can be calculated using the formula: Volume = Base Area × Height. The base area is determined by the area of the triangular base, which can be found using the formula: Area = 1/2 × base × height of the triangle. This makes triangular prisms useful in various applications, including architecture and engineering.