Answer: the answer is A≈8.49
Explanation:
we can use pythagorean theorem to figure out the side of a; a^2+b^2 = c^2 . since we are not finding out the hypotenuse, c, or the longest side of the triangle, we will have to calculate for a, a leg.
c^2﹣b^2 = a
now, plug in our numbers!
9^2 - 3^ = a
9^2 = 81
3^ = 9
subtracting 81 and 9, we get 72!
72 square rooted is 8.49 rounded. to know this is right, the c, longest side, is still the longest side!!! there's your answer :3