Respuesta :
A and C... D would not be right since it is A^2 +B^2 = C^2 not A + B = C
A, B, C. The hypotenuse is the longest side of a right triangle, it is one of the legs of a triangle, and it is opposite the right angle. D is incorrect because its length is a^2 + b^2. And the hypotenuse would be c^2.