15-12-2018
Mathematics

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if r=7 what is the circumference?

if r7 what is the circumference class=

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15-12-2018

The formula of a circumference of a circle:

[tex]C=2\pi r[/tex]

We have r = 7. Substitute:

[tex]C=2\pi(7)=\boxed{14\pi}[/tex]

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