For this case we have the following trigonometric relationship: sine (x) = C.O / h Where, x: angle C.O: opposite leg h: hypotenuse Substituting values we have: sine (20) = 5 / c Clearing c: c = 5 / sine (20) c = 14.619022 Rounding: c = 14.6 in Answer: c = 14.6 in option 4