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28 February, 16:48

For circle O, sector AOB has radius 12 and ∠AOB measures 120°. What is the length of arc AB?

A. 4π units

B. 8π units

C. 12π units

D. 16π units

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Answers (1)
  1. 28 February, 19:36
    0
    arc length = circumference • [central angle (degrees) : 360]

    r = 12

    circumference = 75.3982236862 or 24 PI units

    arc length = 24 PI * [120 / 360]

    arc length = 8 PI

    Answer is B
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