The edges of three squares are joined together to form a right triangle with legs of lengths r and sand a hypotenuse of length t. What must be true?

1) The perimeter of Square T is equal to the sum of the perimeters of Square R and Square S.

2) The area of Square T is four times the area of Square R.

3) The perimeter of Square T is four times the perimeter of Square R.

4) The area of Square T is equal to the sum of the areas of Square R and Square S.