Home » In the diagram, PR is a diameter of the circle PQRS. PST and QRT are…

In the diagram, PR is a diameter of the circle PQRS. PST and QRT are…

In the diagram, PR is a diameter of the circle PQRS. PST and QRT are straight lines. Find QRS

A.
20^o
B.
25^o
C.
30^o
D.
35^o

Correct Answer: Option B

Explanation

o) = 90^o (angle substended by a semi-circle)
∴ oo – 30^o = 60^oo – 35^o = 55^oo + 55^o) = 180 – 115^o = 65^oo(angles in the same segment)o o + 35^o = 180^ooo – 155^o
= 25^o