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Math Help - Circle Geometry

  1. #1
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    Circle Geometry

    Could someone please help me with this circle geometry questions? I just confused just not exactly sure how to do any of these kinds of questions. Any help is apperciated.Thanks in advance
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  2. #2
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    Quote Originally Posted by Dgb186 View Post
    Could someone please help me with this circle geometry questions? I just confused just not exactly sure how to do any of these kinds of questions. Any help is apperciated.Thanks in advance
    Since AOB is an equilateral triangle, angle AOB = π/3 rad.
    Perimeter of the shaded portion is AB + 1/6(2πR) , where R is the radius circle i.e. OA
    Area of the shaded portion is 1/6(πR^2) - area of OAB.
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