By definition we have: A triangular pyramid (also called tetrahedron) is a polyhedron whose surface is formed by a base that is a triangle and triangular lateral faces that converge in a vertex that is called apex (or apex of the pyramid). It will be composed, therefore, by 4 faces, the triangular base and three lateral triangles that converge at the vertex.
Thus, the surface area is: As = 4 * (50.5) = 202 in ^ 2 Answer: The total surface area of the triangular pyramid is: 202 in ^ 2
