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    Proofs : Quadrilaterals

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    1- Prove that in a cyclic quadrilateral we have opposite angles supplementary without introducing the center of the circle.

    2- Prove that a quadrilateral is paralleogram if it is simple and opposite angles are congurent.

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    https://brainmass.com/math/discrete-math/proofs-quadrilaterals-71542

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    1- prove that in a cyclic quadrilateral we have opposite angles supplementary without introducing the center of the circle.
    Solution:

    Consider a cyclic quadrilateral ABCD
    Draw AC and BD.
    Now, ...

    Solution Summary

    Quadrilateral proofs are provided. The solution is detailed and well presented. Diagrams are included.

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