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Math Help - need help to approach prob

  1. #1
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    need help to approach prob

    need to find area of shaded area of road

    i worked out that the shaded area with the radius of 6 is about 7.7m for each side so that is 15.4

    and the middle part is 21-50.25 =29.25 =29.25 * 8 = 234 gives the middle section

    then i found the top circle by pie r squared 3.14*12^2 = 452.38

    i think that is right so far just need some help finding area where the radius is 9
    Last edited by realistic; September 5th 2009 at 12:33 AM.
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