Pythagorean Theorem

It states that in a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides: $a^2 + b^2 = c^2$.

The hypotenuse ($c$) is the longest side of a right triangle and is always the side directly across from the 90-degree right angle.

These are sets of three positive integers that perfectly satisfy the theorem, such as (3, 4, 5) or (5, 12, 13).