# How do you find the diagonal of a rectangle whose sides measure 5 yd and 12 yd?

Oct 16, 2015

13 yd

#### Explanation:

Rectangles have 90 degree angles, so you use the Pythagorean Theorem ${c}^{2} = {a}^{2} + {b}^{2}$
The diagonal is the c side. So
${c}^{2} = {5}^{2} + {12}^{2}$

${c}^{2} = 25 + 144 = 169$

$\sqrt{{c}^{2}} = 13$