Heeelp dksmskdkdkskskskdk I’m stuck

What is the the greatest common factor ?

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given