1.

In the figure, points P, Q, R and S lie on a circle. Then the values of x and y are respectively(1) 40°  and 100°  (2) 35°  and 110° (3) 50°  and 80° (4) 30°  and 120° 

Answer»

(2) 35°  and 110° 

y + 20 + 50 = 180 ⇒ y = 110  and 2x + y = 180 ⇒ x = 35



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