algebra

What is the circumference of the circle if the area of the square is 25m to the second power?

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  1. Area of a circle with radius r,
    A = πr² ...(1)
    Circumference of a circle with radius r,
    C = 2πr ...(2)
    If A=25 m²
    25=πr^sup2;
    r=√(25/π)
    =5/√π
    Calculate value of r and substitute into equation (2) above to find circumference (in metres).

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    posted by MathMate

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