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Mathematics, 22.09.2019 00:00 SRTBANDIT4655

The formula c = 2 π r is used to calculate the circumference of a circle when given the radius. what is the formula for calculating the radius when given the circumference?
a) c/2π = r
b) c/2r = π
c) 2 πc = r
d) 2π/c = r

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