Question

PLZ HELP WITH THIS MATH 20 POINTS

Provide the reasons for this proof .
Given:Line m is parallel to line n.
Prove: <1 is supplementary to <3.

Here is the picture of the full problem.

Answer 1

1. Given
2. If parallel lines are cut by a transversal, then corresponding angles are congruent.
3. Definition of congruency.
4. if parallel lines are cut by a transversal, then corresponding angles are congruent.
5. Linear pairs are supplementary.
6. Definition of supplementary.
7. Substitution
8. Definition of supplementary.

Sorry if these are wrong. I haven't done geometry in so long, but most of these are right. You might want to check number 4 and 2.