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24 March, 19:04

The radius of a circle is 10. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter?

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  1. 24 March, 19:29
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    The ratio of circumference to diameter is independent of the radius.

    Defining C=circumference, r=radius, D=diameter = 2r

    Circumference = C = 2 π r = π D

    =>

    ratio of circumference / diameter

    = C/D = π
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