geometry: statements and reasons

Question

Given : angle 1 and angle 2 are supplementary, angle 3 and angle 4 are supplementary. angle 2 ≅ angle 3

Prove: angle 1 ≅ angle 4

(GIVE THE STATEMENT AND REASONS)

Answer 1

I don't know exactly what your teacher is looking for in this problem.

m angle 2 = m angle 3.....given

180-m angle 2 = 180- m angle 3.....subtraction

m angle 1 = m angle 4.....definition of supplementary and transitive property