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6 August, 09:52

What is the constant of proportionality for the ratio of the length of an arc and the radius?

A Circumference

B Length of radius

C Length of subtended arc

D Radian measure

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Answers (1)
  1. 6 August, 12:33
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    Once in a while, you get a question where the answer satisfies the question.

    It is not A. The arc measure might be part of the circumference but it is not all of it.

    B is included in what you are given.

    C and the arc measure are the same thing.

    D is your answer. The formula is theta*r where theta is the radian measure of the central angle.
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