Answer:
I believe there are 4.
Explanation:
Verticle angles- 2 angles whose sides are opposite rays. For example "X" has 4 verticle angles. There are two "X"'s in the diagram therefore 8 verticle angles are provided! However the question says how many pairs. There are 4 pairs, there fore there are 4 verticle angle PAIRS.
Hope I could help! :))))