- PQ is a tangent to the circle at T. If TR = TS where R and S are points on the circle and $$\angle RST$$ = $$65^\circ$$, theĀ $$\angleĀ PTS $$ =
RT = TS
$$\angle RTS = 180\degree - 65\degree - 65\degree = 50\degreeĀ $$
$$\angle RTP = 65\degree$$
$$\angle PTS =Ā \angle RTP +Ā \angle RTS = 115\degree$$
So, the answer would be option c)$$115^\circ$$
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