A pair of opposite congruent angles formed by intersecting lines is called Vertically opposite angles
Step-by-step explanation:
Vertically opposite angles are angles opposite to each other when two lines cross.
These angles are always equal.
Think of the letter "X" as two long lines that cross, the angles facing each other, maybe up and down, or left and right, are called Vertically opposite.
The Definition of Vertical Angles is the opposite angles formed by two intersecting lines and if two angles are vertical angles, then they have equal measures (or congruent).
In the attach photo, the pair of opposite congruent angles are A&C and B&D
