Two points A and B are on opposite sides of a building. A surveyor selects a third point C to place a transit. Point C is 52 feet from point A and 67 feet from point B. The angle ACB is 60°. How far apart are points A and B?
Use Law of Cosines
522 + 672 - 2 (52)(67)cos(60) = (AB)2 I'll let you finish with the calculations !