Answers

2016-03-21T13:21:30+05:30
Ar(tri.QBC)=1/2 ar(//gm.ABCD)

ar(tri.QBC)+ar(tri.QAB)=ar(//gm.ABCD)

ar(//gm.ABCD)=2×ar(tri.QBC)

ar(tri.QAB+tri.QDC)=2×10

=20sq.cm.
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