In fig. PQRS is a cyclic quadrilateral if angle QRS=1100,find angle SPQ.



We have :QRS = 110°Since, PQRS is a cyclic quadrilateral,    SPQ + QRS = 180°  Opposite angles of cyclic quadrilateral are supplementarySPQ+ 110° = 180°SPQ= 180° - 110°SPQ = 70°

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