What is the exact area of a circle with a circumference of 18 times pi centimeters

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asked May 3, 2017 171k views

1 Answer

Embert · Answer 1 · 2017-05-07T01:42:21+0000

First, find the radius

2
$\pi$ r=circumference
r=18
$\pi$ cm
-------------
2
$\pi$
r=9 cm

Now, we can just use the circle area formula to solve

$\pi$
r^(2)

=
$\pi$

=81
$\pi$
=254.469 cm^2

What is the exact area of a circle with a circumference of 18 times pi centimeters

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