contestada

Given m∠12 + m∠15=180°

Which lines are parallel, if any must be parallel, based on the given information?

1. c || d by the converse of the alternate interior angles theorem
2. a || b by the converse of the corresponding angles theorem
3. c || d by the converse of the same-side interior angles theorem
4. Not enough information to make a conclusion.

Given m12 m15180 Which lines are parallel if any must be parallel based on the given information 1 c d by the converse of the alternate interior angles theorem class=