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Can someone help me please??​

Can someone help me please??​-example-1

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Circumference

The circumference of a circle is its perimeter.

We can solve for the circumference using the following formula:


  • C=2\pi r where r is the radius of the circle

Solving the Question

Part A

We're given:

  • The radius of the circle is 14 cm

Plug the given information into the formula for circumference:


C=2\pi r\\C=2\pi (14)\\C=28\pi

Therefore, the circumference of the circle is 28π cm.

Part B

Replace π with
(22)/(7):


C=28\pi\\\\C=28*(22)/(7)\\\\C=4*22\\C=88

Therefore, the circumference of the circle with
\pi=\frac{22}7} is 88 cm.

User Brian White
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