Question

Which expression helps you find the length x of a side of a rectangle that has a diagonal of 15 units and a width of 9 units?

Answer 1

x2 = 152 – 92

Explanation:

That is the top left option of imagine math

Answer 2

15²-9²= x² use Pythagoras' theorum and square the two smaller sides to get the square of the hypotenuse (the diagonal) then rearrange this to get the above calculation