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`square` PQRS is cyclic . If `/_QPS = 115^(@)` then what is the measure of `/_QRS ` ? Why ?
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`/_QPS + /_QRS = 180^(@)` …..(Opposite angles of cyclic quadrilateral are supplementary )
`:. 115 + /_QRS = 180^(@)`
`/_ QRS = 180^(@) 115^(@) =65^(@)`

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