Ans: In Geometry, a triangular pyramid is also known as a tetrahedron. A triangular pyramid is composed of four faces which are triangular in shape. This structure has a total of six straight edges and four vertex corners. The triangular pyramid is considered as the simplest of all the ordinary convex polyhedra that are in geometry. A triangular pyramid is the only polyhedra that have fewer than five faces. The triangular faces are equilateral and are congruent to the opposite triangular shape. Some shapes with this similar shape are octahedron, triangular prism, square pyramid and icosahedron. A triangular pyramid is an important structure.