Given:
Given a line a and b are parallel.
Required:
To choose the reason for the statement " < 6 is congruent to < 8.
Step-by-step explanation:
The vertical angle is either of two angles lying on opposite sides of two intersecting lines.
Here < 6 and < 8 are vertical angle.
Therefore the correct option is
Vertical angles are congruent.
Final Answer:
The option C is correct.
Vertical angles are congruent.