-52 - 3u = 8 What is u

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.