# Formulas and Tables

Elementary Geometry# Cube

Edge (side) of a cube: \(a\)

Diagonal of a cube: \(d\)

Surface area: \(S\)

Radius of the inscribed sphere: \(r\)

Radius of the circumscribed sphere: \(R\)

Volume: \(V\)

- Diagonal of a cube

\(d = a\sqrt 3 \) - Radius of the inscribed sphere

\(r = a/2\) - Radius of the circumscribed sphere

\(R = a\sqrt 3/2 \) - Total surface area of a cube

\(S = 6{a^2}\) - Volume of a cube

\(V = {a^3}\)