The distances between three cities are shown. If two planes leave city B at the same time, one to city A and the other to city C, what is the angle between their flight paths, x? Triangle ABC with sides, AB equal to 220 miles, AC equal to 310 miles, and BC equal to 390 miles. Angle B, which is between sides AB and BC, has a measure of X degrees. A.37.5 B.52.5 C.75.0 D.103.0