Question

Which of the following statements must be true to prove lines m and n are parallel?

Answer 1

Answer:

option C

Step-by-step explanation:

m∠3 =m∠6 ( Alternative Interior Angles are equal )

But m∠5 & m∠6 are linear pair. So ,

m∠5 + m∠6 = 180°

=> m∠5 + m∠3 = 180° ( because m∠3 =m∠6 )