Nitin P. answered • 06/02/20

B.S. in Computer Science and Applied Mathematics from UC Berkeley

The HL method of congruence says that two right triangles are congruent if their hypotenuses are congruent and so are at least one pair of corresponding legs. We already have AB = DE, so we just need the hypotenuses to be congruent. Therefore, we need AC = EC, or option D.