Determine whether a Triangle with side lengths of 12, 16 and 20 is a Right Triangle

A Right Triangle must satisfy the Converse of the Pythagorean Theorem: a² + b² = c²
From the given side lengths, let a = 12, b = 16, c = 20  (c cannot be less than a or b)
a² + b² = (12)² + (16)²
a² + b² = 144 + 256 = 400
c² = (20)² = 400
a² + b² = c²  (400 = 400)
Therefore, a Triangle with side lengths of 12, 16 and 20 is a Right Triangle
Note: Since the side lengths are positive integers, they are a Pythagorean Triple