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Math Help - Deductive Geometry - Cyclic Quadrilaterals Help

  1. #1
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    [Solved] Deductive Geometry - Cyclic Quadrilaterals Help

    Hi, here is the question and diagram.



    I know that OECD is a cyclic quadrilateral, but I'm not sure how to work from there.

    Thanks for helping, BG
    Last edited by BG5965; September 24th 2009 at 06:11 AM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by BG5965 View Post
    Hi, here is the question and diagram.



    I know that OECD is a cyclic quadrilateral, but I'm not sure how to work from there.

    Thanks for helping, BG
    \angle AEO= \angle OAE as \triangle AOE is equilateral

    This implies that \angle DEB = \angle EBD since \angle CAB+\angle ABC= 90^{\circ} and \angle AEO+ \angle DEB=90^{\circ}.

    CB
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