2 pi r....................r being radius................2 times 1/2.......is one..........one times pi is pi.......
Circle
The variable
r
should be positive
There is no solution for
C
(violates
C
> 0
). Please modify the input values.
https://www.khanacademy.org/...perimeter/...circumference-circle/...
The usual definition of pi is the ratio of the circumference of a circle to its diameter, so that the circumference ...
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