8. To find the distance between two points A and B that lie on opposite banks of a river, a surveyor lays off a line segment AC of length 240 yards along one bank and determines that the measures of angle BAC and angle ACB are 63°20' and 54°10', respectively (see the figure). Approximate the distance between A and B. (Ans: 219 yd) 240- 63 20 54 10 B

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