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21 May, 06:58

To obtain the length of an arc, what fraction is multiplied by the circumference of a circle (C = 2πr) ?

B. pi over 180

A. pi over 360

C. radius over 360

D. central angle over 360

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Answers (1)
  1. 21 May, 10:18
    0
    The arc length by definition is given by:

    s = r * theta

    Where,

    r: radius of the circle

    theta: central angle in degrees

    Substituting values we have:

    s = 2πr * (theta / 360)

    Answer:

    D. central angle over 360
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