Which of the following facts, if true, would allow you to prove that lines l and m are parallel? * 0/
1 m∠2 + m∠4 = 180°
m∠1 = m∠8
m∠6 + m∠3 = 180°
1 answer
If the fact m∠6 + m∠3 = 180° is true, then lines l and m are parallel because that would mean lines l and m form a pair of supplementary angles, which is a property of parallel lines cut by a transversal.