Answer
$(3, 4, 5)$ is a Pythagorean Triple
Work Step by Step
The longest side is always the hypotenuse. $c=5$
Using the Pythagorean Theorem...
$a^{2}+b^{2}=c^{2}$
$3^{2}+4^{2}=5^{2}$
Simplify...
$9+16=25$
$25=25$
Since the equation is true, the numbers $(3, 4, 5)$ are a Pythagorean Triple.
