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Question

In the given figure, PQR=PRQ, then prove that PQS=PRT.

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Solution

In the given figure, ST is a straight line and ray QP stands on it.
PQS+PQR=180 ( Linear Pair)
PQR=180PQS……………..(1)
PRT+PRQ=180 (Linear pair)
PRQ=180PRT……………(2)
It is given that PQR=PRQ.
Equating equation (1) and (2), we obtain,
180PQS=180PRT
PQS=PRT

Hence proved.


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