# Rectangular prism

A rectangular prism (also cuboid, rectangular box, right rectangular prism, rectangular paralleliped) is a three dimensional figure with 6 faces that are all rectangles.

Opposite faces of a rectangular prism are congruent and parallel.

The volume can be determined by multiplying the length, width, and height, $V = lwh$.

The length of the interior diagonals can be determined by using the formula $d = \sqrt{l^2 + w^2 + h^2}$.