# How do you use the Pythagorean Theorem to determine if the three sides are a right triangle: 48.5 ft, 39 ft, 32.5 ft?

Just check ${a}^{2} + {b}^{2} = {c}^{2}$ where $c$ is the largest value.
${32.5}^{2} + {39}^{2} = 1056.25 + 1521 = 2577.25$
${48.5}^{2} = 2352.25$
$2577.25 \ne 2352.25$ so this triangle is not right angled.