# Radius of a middlescribed sphere of a Regular Octahedron

## Description

An octahedron is a polyhedron with eight faces. A regular octahedron is a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. The midradius, which touches the middle of each edge, is related to the edge of the octahedron.

Related formulas## Variables

r_{m} | Midradius of the middlescribed sphere of the octahedron (m) |

a | Length of the edge of the octahedron (m) |