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Math Help - Math contest Quadrilaterals in Circle

  1. #1
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    Math contest Quadrilaterals in Circle

    Hi i need help guys :/ Any help would be much appreciated.

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  2. #2
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    Re: Math contest Quadrilaterals in Circle

    Read about cyclic quadrilaterals on Wikipedia.
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  3. #3
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    Re: Math contest Quadrilaterals in Circle

    they are angles in a cyclic quadrilateral and hence supplementary. Sum of both is 180.
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