Explanation:
Find the missing third side
perimeter 8 + 5 + x = 22
x = 9 <==== third side
IF this is a right triangle the hypotenuse = 9 and the Pythagorean theorem
will apply
hypotenuse ^2 = leg1^2 + leg2^2
9^2 = 8^2 + 5 ^2 ???? true?
81 = 64 + 25 ?? False.... this is NOT a right triangle