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Question

In the given figure ,ABCD is a quadrilateral.A line through D parallel to AC meets BC produced at E.Prove that ar(ABE)=area of quadrilateral ABCD
1310902_2563bfc02965453bb19fb587172e841a.PNG

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Solution

From the figure, notice that ADC and ACP are on the same base between the same parallel lines.
Hence ar(ADC)=ar(ACE)
Also,area of quadrilateral ABCD=ar(ADC)+ar(ABC)
=ar(ACP)+ar(ABC)
=ar(ABE)

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