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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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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

User Ryan Leonard
by
8.0k points

1 Answer

3 votes
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
User Kohanz
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6.7k points
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