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Question

A point P is taken on side CD of a parallelogram ABCD and CD is produced to Q making DQ = CP. The line through Q parallel to AD meets BP produced at S and AD is produced to meet BS at R. Prove that ARSQ is a parallelogram.
1112366_3c738acd8f704feda7d48dfe742096cc.png

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Solution

QD=CP [ Given ] ---- ( 1 )
AB=CD [ Opposite sides of parallelogram ]
AB=CP+DP
AB=QD+DP [ From ( 1 ) ]
AB=QP
ABQP [ Since, ABCD ]
ABPQ is a parallelogram.
AQBP
As SR is extended part of BP
AQSR
AQRP
QSAR
ARSQ is a parallelogram.

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