👉 A tetrahedron is a pyramid with four triangular faces. It has six vertices and twelve edges, making it one of the simplest polyhedra in three-dimensional space. In geometry, a tetrahedron is defined as follows: - A tetrahedron has four triangular faces. - The sum of the lengths of any two sides of a tetrahedron is greater than the length of the third side. - All edges are congruent and all vertices lie on a plane formed
