Which of the following gives the best statement of the pythagorean theorem? a. in a right triangle, the square of the length of the hypotenuse equals the sum of the square of the lengths of the legs. b. in a right triangle, the square of the length of the hypotenuse equals the difference of the squares of the lengths of the legs. c. if the square of the length c of one side of a triangle equals the sum of the square of the lengths of the legs, then it is a right triangle with the hypotenuse of length c. d. if the square of the length c of one side of a triangle equals the difference of the square of the lengths of the legs, then it is a right triangle with hypotenuse of length c.