Brainliest to whoever asks as long as it's correct.

m∥nm∠2=60°given
∠8≅∠2
m∠8=m∠2 angle congruence postulate
m∠8=60° substitution property of equality
m∠7+m∠8=180° linear pair postulate
m∠7+60°=180° substitution property of equality
m∠7=120°

subtraction property of equality
alternate interior angles theorem
division property of equality
alternate exterior angles theroem