PQ is a diameter of a circle with centre O. RS is a chord parallel to – McqOptions

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1.	PQ is a diameter of a circle with centre O. RS is a chord parallel to PQ subtends an angle of 40Â° at the centre of the circle. If PR and QS are produced toÂ meet at T, then what will be the measure (in degrees) of âˆ PTQ?
A.	55
B.	60
C.	70
D.	90
Answer» D. 90

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