PQRS is a cyclic quadrilateral in which pr and qs are its diagonal. If angle RQS = 55, angle QPR =45, find angle QRS.
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given PQRS is a cylic quad
in triangle QSR
RQS = 55°
QSR=45°(angle subtended by the same chord RQ)
QRS = {180-( 55+45)}°
={°180-100}
80°
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