Answer:
2. ∠1≅∠4 and ∠3≅∠5
4. Substitution property of equality
Explanation:
∠1 and ∠4 are alternate interior angles
∠3 and ∠5 are alternate interior angles
Therefore
∠1≅∠4 and ∠3≅∠5
∠1 substitutes ∠4 and ∠3 substitutes ∠5 (from 3.)
This is the substitution property