nataleighkirk nataleighkirk

07-11-2016
Mathematics

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plsssssssssssssssssssssssssssssss help meThe circumference of a circle is equal to 72 pi. Find the radius of this circle

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Аноним Аноним

07-11-2016

You know the circumference. You want to find the radius.

This is using the reverse circumference formula!

CIRCUMFERENCE OF A CIRCLE:
[tex]2 \pi r[/tex] = circumference

Now plug in. [tex]2 \pi r = 72 \pi [/tex]

Simplify and isolate r.

[tex]2r=72[/tex]

[tex]r=36[/tex]

the radius is 36.

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