1) m<1+m<2=180 ========> supplementary angles 2) m<3+m<2=180 ========> opposite angles are equal (vertical angles theorem) 3) m<3 and m<5 are supplementary ====> Consecutive Interior Angles 4) L || M =====> corresponding angles converse.(If two lines cut by a transversal so that corresponding angles are congruent,then the lines are parallel to each other.)
