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Question

In the given figure, ABCD is a parallelogram and PD is parallel to QC.

S1 : APD BQC

S2 : area(APD) + area(PBCD) = area(BQC) + area(CDPB)


A

S1 is true but S2 is false

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B

S1 is false but S2 is true

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C

Both S1 and S2 are false

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D

S1 and S2 are both true and S1 is the explanation for S2

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Solution

The correct option is D

S1 and S2 are both true and S1 is the explanation for S2


In APD and BQC

PAD=QBC (corresponding angles)

AD = BC ( opp. sides of parallelogram)

APD=BQC (corresponding angles)

APDBQC by AAS criteria

And area(APD) = area(BQC) (congruent triangles have equal areas)

Adding area(PBCD) on both sides of the equation

area(APD) + area(PBCD) = area(BQC) + area(PBCD)

Therefore, both S1 and S2 are true and S1 is the explanation of S2.


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