no
Only if you add them it is possible but not by themselves
No
In a Linear Pair the 2 angles add up to 180 degrees while Vertical Angles are just 2 vertical angles that are congruent.
No
The Vertical Angles Theorem says that a pair of vertical angles are always congruent.
Yes, a pair of intersecting lines always forms a pair of vertical angles.
parallel
Yes if they are right angles
you bet it can
No, in fact, vertical angles can't be a linear pair. Vertical angles are opposite from each other which also make them equal each other. A linear pair has two angles adjacent to each other that eqaul 180 degrees.
which pairs of angles in the figure below are vertical angles
Vertical angles occur when 2 angles are directly across from each other and are congruent.