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Question

In figure, PARS is cyclic quadrilateral whose diagonal intersect at A if SQR=800 and QPR=300, then find SRQ.
1877941_18bf35fa4bfc453f902b843c5afb7e6f.png

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Solution

Given : SQR=800
Now SQR=SPR [angles of same segment]
SPR=800
SPQ=SPR+RPQ
=800+300
or SPQ=1100
but SPQ+SRQ=1800 [Sum of opposite angles of cyclic quadrilateral]
SRQ=1800SPQ
=18001100=700
Thus, SRQ=700

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