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21 March, 13:05

A circle has a radius f length r. If you mark off an arc on the circle of length 3r, what is the measurement of the angle that subtends the arc?

A. 3pi radians

B. 3radians

C. 3r radians

D. 3pi r radians

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Answers (1)
  1. 21 March, 15:51
    0
    Length of an arc = θ/2π * 2πr = rθ; where θ is the angle substended by the arc at the center.

    3r = rθ

    θ = 3 radians.
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