To determine the length of a chain line crossing a river, a line AD was set at right angles to the chain line at A, At D, a right angle was set to obtain a point C with the angle BDC being a right angle. If the length AD= 65 m and AC = 22. 5m, find the length AB?
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Answer:
7.788
Step-by-step explanation:
Measure AC and AD triangle ABC and ACD are similar
therefore, AB/AC=AC/AD
OR AB=(AC)*2(whole square)/AD
=(22.5)*2/65
AB=7.788
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