A triangular prism is a three-dimensional shape with two parallel triangular bases and three rectangular faces connecting the bases. The triangular bases can vary in size and shape, but they must be congruent, meaning they are identical in size and shape. This geometric figure is classified as a type of polyhedron. Triangular prisms can be found in various real-world applications, such as in architecture and design. They are also commonly studied in geometry to understand properties like volume and surface area. The volume of a triangular prism can be calculated by multiplying the area of the triangular base by the height of the prism.