Select the correct answer from each drop-down menu. Given: 1 is complementary to 2 Given: m4=40 Prove: m2=50 Complete the proof in paragraph form. 1 is complementary to 2 (given). m2+m1=90 (definition of complementary). m4=m1 (definition of congruence). 40 =m1 (substitution). Using the property of equality: m4=40 (given). By substitution, 40 +m2=90 . Finally, solving for m2: m2=50