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Math Help - Confusing Circle Geometry

  1. #1
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    Exclamation Confusing Circle Geometry

    In the diagram below, AC is the diameter of the circle AECFG with centre O and BD is a tangent to the circle at C. (ii) Prove that DFEB is a cyclic quadrilateral. (the first part links to this question - it involved me proving that angle FEC = angle FCD).

    http://www.mathhelpforum.com/math-he...-untitled1.bmp

    Could someone please please give me a hint on how to start this proof???
    Last edited by xwrathbringerx; October 8th 2008 at 05:22 PM.
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