In the adjoining figure:

- Is ∠1 adjacent to ∠2 ?
- Is ∠ AOC adjacent to ∠ AOE ?
- Do ∠ COE and ∠ EOD form a linear pair ?
- Are ∠ BOD and ∠ DOA supplementary ?
- Is ∠ 1 vertically opposite to ∠ 4 ?
- What is the vertically opposite angle of ∠ 5 ?

In the adjoining figure:

- Is ∠1 adjacent to ∠2 ?
- Is ∠ AOC adjacent to ∠ AOE ?
- Do ∠ COE and ∠ EOD form a linear pair ?
- Are ∠ BOD and ∠ DOA supplementary ?
- Is ∠ 1 vertically opposite to ∠ 4 ?
- What is the vertically opposite angle of ∠ 5 ?