Question

Which of the following measurements could be the side lengths of a right triangle?
A.
42 in, 63 in, 70 in
B.
42 in, 56 in, 84 in
C.
35 in, 56 in, 70 in
D.
42 in, 56 in, 70 in

Answer 1

D. 42, 56, 70

Because 42^2 + 56^2 = 1764 + 3136 = 4900 = 70^2 (they form a 3-4-5 triangle scaled by 14).