idekkay idekkay 10-01-2023 Mathematics contestada Which of the following 3 lengths can be combined to form a right triangle? A. a = 1, b = 2, c = 3 B. a = 7, b = 12, c = 13 C. a = 9, b = 20, c = 21 D. a = 8, b = 15, c = 17