Question

In the given fi gure, O is the centre of the circle. If AOB = 120°, BAC = 10°, then fi nd the measure of

CBO. ​

Answer 1

Answer:

Here, ∠AOC + ∠COB = 180°

∠AOC = 180° - ∠COB

= 180° - 120° = 60°

Now, x = 1/2 ∠AOC = 1/2 × 60° = 30