Definitions for "Vertical Angles"
Angles that are equal and opposite from each formed by the intersection of two lines. In the image to the right, angles ABC and DBE (highlighted in blue) comprise a pair of vertical angles; ABD and CBE (highlighted in purple) comprise a second pair. Check out this link to MathLeague for more information on vertical angles.
A pair of non-adjacent angles formed by intersecting lines; also called vertically opposite angles
A pair of opposite angles that is formed by intersecting lines.