How Many Edges Does a Tetrahedron Have?

many-edges-tetrahedron Credit: Incase/CC-BY-2.0

A tetrahedron is a shape made out of four triangular faces, and it has a total of six edges. Although each of the four sides of a tetrahedron has three edges, the shape does not have 12 edges, as some of the edges are shared.This figure can also be referred to as a triangular pyramid.

The word "tetrahedron" comes from the late Greek word "tetraedron," which is a combination of the prefix "tetra," which means "four," and "hedra," which refers to the base of a solid figure. One of the sides of a tetrahedon is a triangular base, and the other three sides extend from the base and meet at a point on the top.