which statement explains the Pythagorean theorem

if a triangle is a right triangle, then the sum of the squares of the longest leg and the hypotenuse is equal to the square of the third side

in the interior angles of a triangle add up to 180 degrees, then the sum of the legs of the triangle is equal to the square of the hypotenuse

if all angles in a triangle are of equal measure, then the length of all sides will equal

if a triangle is a right triangle, then the sum of the square of then legs is equal to the square of the hypotenuse

if a triangle is a right triangle, then the sum of the square of the legs is equal to the square of the hypotenuse