Mathematics: Find the area of a circle with the circumference 18(pi)

Find the area of a circle with the circumference - id18340276, sgslayerkingminecraf

adrianna2324

10.03.2022

D 81 pi units^2

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi *r

18 pi = 2 * pi *r

Divide each side by 2 * pi

18 pi / (2 pi) = 2 pi * r/ (2 pi)

9 = r

Now we can find the area. Area is given by

A = pi r^2

A = pi * 9^2

A = 81 pi units^2

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kylee76

10.03.2022

Circumference = $2\pi r$

$\frac{18\pi}{2\pi} = \frac{2\pi r }{2\pi }$

18 ÷ 2 = 9

r = 9

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Area = $\pi r^{2}$

= $\pi (9)^{2}$

= 81 $\pi$ units².

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raquelqueengucci25

16.02.2021

thank you!

Step-by-step explanation:

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