given a = 15 m and b = 9 m and c = 1 so you can find the hypo. of the right triangle on the right =15^2 + 9^2 =225 + 81 =306 so hypo. of the right triangle on the right = √306
the hypo of the right triangle is long leg of the right triangle on the left so x^2 = 1^2 + 306 = 307 x = √307 x = 17.5 m
