Which of these measures could not be the lengths of the sides of a right angle?

A. 4,10,16

B. 5,12,13

C. 7,24,25

D. 8,15,17

The correct answer is A.

Not only could these measurements not be the sides of a right triangle, but they also could not be the measurements of any triangle at all. This is because the lengths of the two shortest sides of a triangle must be greater than the longest side. As you can see with the measurements of A, that is not the case.

4 + 10 < 16

Therefore, these measurements do not even create a triangle.