Question

B part... please solve it...!​

Answer 1

Answer:

$\large\boxed{\sf{(i) \angle\:BOC = 40\degree , (ii) \angle\:OAC = 120\degree}}$

Step-by-step explanation:

Given that ,

$\sf{arc \:AB = 2( arc \:BC )}$

Therefore, We have,

$\sf{\angle \:AOB = 2 \angle\: BOC }$

But, it's given that,

$\sf{\angle \: AOB = 80 \degree}$

Therefore,

$\sf{(i) \angle \: BOC = 40\degree}$

And, we have,

$\sf{(ii)\angle\: OAC = (80+40) = 120\degree}$