In this case the answer is very simple. .
We must analyze the Alternate Interior Angles Theorem.
Statement 01:
Reasons: They are supplementary
Statement 02:
2.
∡1 + ∡4 = 180 °
Statement 03:
∡1 , ∡4 , ∡2 are suplementary
Statement 04:
∡3 , ∡4 are congruents
They have the same measure
Statement 05:
Reason: Complementary angles
Statement 06:
∡3 , ∡4 are transitive
