For numbers 12-13, refer to the given figure below.
12. Which pair of angles are vertical angles?
A. ∠1 and ∠4
B. ∠2 and ∠6
C. ∠1 and ∠3
D. ∠2 and ∠5
13. Which pair of angles are linear pair?
A. ∠1 and ∠4
B. ∠2 and ∠6
C. ∠1 and ∠3
D. ∠2 and ∠5
