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Step-by-step explanation:
Const.=Join QT
Angle QOT=180°-Angle POT
=180°-140°
=40°
IN triangle TOQ,
OT=OFQ
angle OTQ=angle OQT=X
angle (OTQ+OQT+QOT)=180°
40°+x+x=180°
40°+2x=180°
2x=140°
x=70°
Angle OTQ=Angle OQT=70°
angle RQT=180°-angle OQT
=180-70
=110
PQTS is a cyclic quadrilateral,
angle RTQ=angle SPQ=45°
Hence angle RTQ=45°
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