Which best summarizes the Pythagorean theorem

The Pythagorean Theorem says that the square of the longest side—the hypotenuse—of a right triangle is equal to the sum of the squares of the two other legs.

Mathematically, we write
[tex]c^2=a^2+b^2[/tex],
where c is the length of the hypotenuse, and a and b are each of the two legs.