intersecting lines proof easy(15 points ) halfway done

Answer:
See below
Step-by-step explanation:
Statement | Reason
1. ∠1 ≅ ∠11 | 1. Given
2. ∠1 ≅ ∠9 | 2. Corresponding angles theorem
3. ∠11 ≅ ∠9 | 3. Transitive property of equality
4. a║b | 4. Corresponding angles converse