Law of cosines.
Cos(angle) = Adjacent Leg / Hypotenuse
Cos(60) = 20 / x
X = 20/cos(60)
x = 40 ft.
Answer:
40
Step-by-step explanation:
You have a 30-60-90 right triangle. The hypotenuse is twice the length of the short leg.
BC = 2 * 20 = 40
