R, S, and T represent the lengths of the three sides of a right triangle. Select the equation that represent the relationship between R, S and T. (the two's are exponents) a. R 2+ S 2= T 2

b. R 2+ T 2 = S 2

c. R 2 + R 2= S 2

d. T 2 + S 2= R 2

e. T 2- S 2= R 2