Answer:
Step-by-step explanation:
1. Given (it was given)
2. Opposite Interior Angles Theorem (states that the alternate interior angles created from two parallel lines and a transversal line are congruent)
3. Given (it was given)
4. Definition of midpoint (a midpoint splits a line in half, halves are congruent)
5. Vertical Angles Theorem (states vertical angles are congruent)
6. ASA (states that triangles with two pairs of congruent angles, and congruent sides that are between the angles are congruent)
