In the diagram, PR is a tangent to the circle at Q, QT//RS,

In the diagram, PR is a tangent to the circle at Q, QT//RS,

  • A.
    40(^o)
  • B.
    65(^o)
  • C.
    85(^o)
  • D.
    95(^o)
Correct Answer: Option D
Explanation

In the diagram,

a = 50(^o) (alternate angles)

b(_1) + a 35(^o) = 180(^o) (sum of angles on a straight line)

i.e; b(_1) + 50(^o) + 35(^o)

= 180v

b(_1) + 180(^o) – 85(^o) = 90(^o)

But b(_2) = (b_1) = 95(^o) (angles in alternate segement)

<QST = b(_2) = 95(^o)

 

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