# Regular Icosahedron (Surface Area)

## Description

An icosahedron is a polyhedron with 20 triangular faces, 30 edges and 12 vertices. A regular icosahedron has 20 identical equilateral faces, with five of the triangular faces meeting at each vertex. The area of the icosahedron is related to the length of the edge of the equilateral face.

Related formulas## Variables

A_{i} | Area of the surface of the icosaedron (m^{2}) |

a | Length of the edge of the triangle face (m) |