STATEMENTS REASONS

I need help with reasoning for 3,4 and 5
1. ​ ∠2 ≅ ∠4 1. Given
2. ​ m∠2 = m∠4 2. Definition of Congruent Angles
3. ​ m∠1+m∠2 = 180° ; m∠3+m∠4 = 180°-

4. ​ m∠1 + m∠2 = m∠3 + m∠4-

5. ​ m∠1 + m∠2 = m∠3 + m∠2-

6. m∠1 = m∠3 6. Subtraction Property of Equality
7. ​ ∠1 ≅ ∠3 7. Definition of Congruent Angles