The correct statement about the Proof of the Pythagorean Theorem is:
To make a right triangle in the center, the area of the smaller two squares must add to equal the area of the largest square.
This statement captures the essence of the Pythagorean Theorem, which is expressed as \(a^2 + b^2 = c^2\) for a right triangle with legs \(a\) and \(b\), and hypotenuse \(c\). This means that the area of the square built on the two shorter sides (the legs) equals the area of the square built on the longest side (the hypotenuse).