solve for oblique triangle given of two side,,, it is desired to find the distance betwen two points A and B lying on opposite banks of river A line segment AC of lenght 240ft.is laid off and the measure of angle B A C and A C B are found to be 62degre 20minutes and 54degre 10minutes respectively approximate the distance from A to B

since we have two angles of the triangle, and the three angles A,B,C add to 180°,

62°20' + 54°10' + m<B = 180°
m<B = 63°40'

AB/sin62°20' = 240/sin63°40'
AB = .886 * 240 / .896 = 237.3 ft