Answer:
10.39
Explanation:
In a 30-60-90 right triangle, the ratio of the three sides are
√3 : 1 : 2
The longest side is, of course, the hypotenuse
In general, if the hypotenuse is a, The side opposite the 30° angle is a/2 and the side opposite the 60° angle is a(√3/2)
Given a = 12, y = 12/2 = 6
x = ( √3/2) x 12 = 10.39