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

Question

Mathematics

Dominic Mejia

9 July, 10:53

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

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Answers (2)

Know the Answer?

Sunny · Answer 1

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.

Donna Wolf · Answer 2

The circumference is the radius times 2 times 3.14