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nirvana33 [79]
3 years ago
15

Find the area of a circle with a circumference of 6 pi

Mathematics
2 answers:
N76 [4]3 years ago
7 0
To find the circumference of a circle you use the formula C=pi*(radius*radius). If you know that the cuircumference is 6 pi, you first plug that in to solve for the radius.
6pi=pi*(r*r)
6pi/pi=(r*r)
Square root of(6pi/pi)=r
2.45=r
Then to find the area you use the formula A=pi*(r*r) which is
A=Pi*(2.45*2.45)
A=6pi or 18.85
elena-14-01-66 [18.8K]3 years ago
3 0
The circumference formula is 2\pir and if the circumference is 6pi then the radius is 3. apply that to the area fromula ( \pir^2 ) and you get 9\pi
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