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3 votes
How can you calculate the circumference if you know the circle's radius?

User Sannu
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2 Answers

3 votes
Set up the formula for the area of a circle.
The formula is A = πr^2 {A=\pi r^{2}} , where A equals the area of the circle, and r equals the radius.Solve for the radius. ...
Plug the area into the formula. ...
Divide the area by . ...
Take the square root.
User Aphoe
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4 votes
The circumference is the radius times 2 times 3.14

User Ajender Reddy
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