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The area of a circus ring is about 1,385 square feet. What is the circumference of the ring?

  • Math -

    A = pi * r^2

    1385 = 3.14 * r^2

    1385/3.14 = r^2

    44.108 = r


    C = pi * d

    C = 3.14 * 88.2

    C = ?

  • Math -

    use area of circle formula.

    a=pi r^2
    c=pi d

    Thus, we need to plug in numbers. 1385/pi = r^2. We take the square root of that to get the radius.Then, we can double that radius and multiply by pi to get the circumference.

    the formula would be 2pi sqrt1385/sqrt pi

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