Answer
Yes
Work Step by Step
You have to use the Pythagorean theorem to determine if this is a right triangle.
A=1.3, B=8.4, C=8.5:
$a^{2}$+$b^{2}$=$c^{2}$
$1.3^{2}$+$8.4^{2}$=$8.5^{2}$ -simplify the exponents-
1.69+70.56=72.25 -simplify like terms-
72.25=72.25
They are equal so yes this is a right triangle.
