Answer:
Reason given in explanation
Step-by-step explanation:
1. Given : Lines A and B are parallel, C and D are transversals .
2. We know that if two lines are parallel then alternate interior angles are equal.
As lines A and B are parallel, ( are alternate interior angles )
3. We know that if two lines are parallel then alternate interior angles are equal.
As lines A and B are parallel, ( are alternate interior angles )
4. As lie on a straight line,
5. From point 2, 3, 4, we get