A triangular pyramid, also known as a tetrahedron, is a three-dimensional geometric shape with four triangular faces. It has four vertices and six edges. Each face of the pyramid is a triangle, and the shape is one of the simplest forms of a polyhedron. In a triangular pyramid, one triangle serves as the base, while the other three triangles meet at a single point called the apex. This structure is commonly found in various fields, including architecture and engineering, where it is valued for its strength and stability.