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Math Help - Area of a Sector

  1. #1
    Banned
    Joined
    Oct 2007
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    158

    Area of a Sector

    Those lines in the circle are both radius'. The radius is 3. I'm supposed to find the area of the sector. How do I solve this?

    Is the answer:

    a. 3\pi

    b. \frac{9\pi}{4}

    c. \frac{3\pi}{4}

    d. 9\pi
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  2. #2
    Junior Member
    Joined
    Feb 2008
    Posts
    60
    The area of the sector is given by:

    A = (pi*rē) x (θ/360)

    r is the radius

    θ is the angle of the sector you are trying to find the area of (in your case, it would be 90 degrees)

    -----

    A = (pi*9) x (90/360)
    A = (pi*9) x (1/4)
    A = 9pi / 4
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