# How do you find the length of the diagonal of a rectangle in terms of its base b and altitude h?

Mar 18, 2018

$d = \setminus \sqrt{{b}^{2} + {h}^{2}}$

#### Explanation:

Rectangles have right angles at their corners. So the pythagorean theorem applies:

${d}^{2} = {b}^{2} + {h}^{2}$

Hence:
$\textcolor{g r e e n}{d = \setminus \sqrt{{b}^{2} + {h}^{2}}}$