The correct statement about the Pythagorean Theorem is:
C: The square of the largest side of a right triangle is equal to the sum of the squares of the two other sides.
In terms of a right triangle, if the sides are labeled as \(a\) and \(b\) (the two shorter sides) and \(c\) (the longest side, or hypotenuse), the Pythagorean Theorem states that:
\[ c^2 = a^2 + b^2 \]