Question

someone please answer this question​

Answer 1

Step-by-step explanation:

<AOC and <AOD form a liner pair

so, <AOC + <AOD= 180

42 + <AOD = 180

I) <AOD = 138°

<AOC and <BOD are vertically opposite angles

so, <AOC = <BOD

ii) <BOD = 42°

<AOD and <COB are vertically opposite angles

so <AOD = <COB

iii) <COB = 138°