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To prove a given quadrilateral a parallelogram

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In the parallelogram ABCD, AN bisects the angle DAB, NC bisects angle BCD. Prove that AMCN is a parallelogram.

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This solution gives a step by step procedure to prove a given quadrilateral, with some geometric conditions satisfied, is a parallelogram.

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Step by step procedure is given in the attachment.

Given, AN bisects the angle DAB. So, ...

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