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, which means it is made up of flat surfaces. The height of the prism is the perpendicular distance between the two triangular bases. Triangular prisms can be found in various real-world applications, such as in architecture and design. They are also commonly used in optics, where they can refract light, splitting it into its component colors. This property makes them useful in devices like prism glasses and spectroscopes.