12. In the adjoining figure, O is any point inside a() ar(AOAB)+ ar(AO – InterviewSolution

1.	12. In the adjoining figure, O is any point inside a() ar(AOAB)+ ar(AOCD) ar(lgm ABCD),(ii) ar(AOAD) + ar(AOBC)--ar(11gm ABCD).parallelogram ABCD. Prove that= _
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