Answer:
4
Step-by-step explanation:
Vertical angles are angles formed when two straight lines intersects at a point forming vertical angles that share the same vertex and are directly opposite to each other.
In the diagram given, we have the following pairs of vertical angles:
<7 and <9
<8 and <10
<12 and <14
<11 and <13
Therefore there are 4 pairs of vertical angles
