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2014-06-05T15:55:15+05:30

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Make the points as A B C D NOW take (x , y ) As the interesting points of the diagonals AC and BD now find the mid points of AC (-7+15)/2 and (-3+8)/2 (4,5/2) Now find the mid point of BD if mid point of AC and BD are same then it is the point of a parallelogram
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