Question

Given a∥b , and c is not parallel to a or b, which statements must be true?

Select each correct answer.


m∠3=m∠7


m∠1=m∠12


m∠1=m∠8


m∠5=m∠9

Answer 1

The first and third answers are true.

Explanation:

angles 3 and 7 are corresponding angles, and 1 and 8 are alternate exterior angles.