Question

(1) In the adjoining figure, O is the centre of the circle, if angle OAB = 30°,
angle ABC= 120°, angle BCO = yº and angle COA= x°, let us find x and y.​

Answer 1

Step-by-step explanation:

angle x = 360 - (120×2) = 120°

y = 360°- (120+30+120)° = 90°