The circumference of the circle is calculated by the formula

4 π r

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2 π r^{2}

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3 π r

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none of these

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Solution

The correct option is D none of these
The circumference of the circle is calculated by the formula $2 π r$ , where $r$ is radius of the circle.

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Similar questions

What is the circumference of a circle with radius 2r units?

C

2 π

r_{1}

r_{2}

r

r = r_{1} + r_{2}

r_{1} + r_{2} > r

r_{1} + r_{2} < r

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