How to Calculate Circumference from Area?

For a circle, use the area formula: (A = pi r^2)

Solve for the radius: (r = sqrt{frac{A}{pi}})

Use the circumference formula: (C = 2pi r)

Substitute the radius from the area formula: (C = 2pi sqrt{frac{A}{pi}})

Simplify: (C = 2sqrt{pi A})

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