AD and BC are two parallel banks of a river where A is directly opposite B. When Tom walks 42m from B to a point C; he observes that ACB = 50°

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Question 3. (4 points) AD and BC are two parallel banks of a river where A is directly
opposite B. When Tom walks 42 m from B to a point C, he observes that ZACB = 50°.
Find:
(a) the width of the river,
(b) ZBCM, where M is the midpoint of AB
D
M
50
42
C