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In Fig.9.25, diagonals AC and BD of quadrilateralABCD intersect at O such that OB ODIfAB CD, then show that0ar(DOC)- ar (AOB)() ar (DCB) ar(ACB)(i) DAICB or ABCD is a parallelogram.Hint: From D and B, draw perpendiculars to ACFie. 9.25

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