If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.? = 120°, A = 20 square meters, r = ?
A. 20.93 m
B. 4.37 m
C. 4.58 m
D. 83.73 m
Answer: B
Mathematics
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