in the figure, a b, and both lines are intersected by transversal t. complete the statements to prove that m<1 = m<5. a b given. m<1+m<3=180 (linear pair theorem). m<5+m<6=180 (linear pair theorem). m<1+m<3=<5+<6(alternate interior angles theorem, transitive property of equality, alternate exterior angles theorem, vertical angles theorem). m<3=m<6 ( alternate interior angles theorem, transitive property of equality, alternate exterior angles theorem, vertical angles theorem). m<1=m<5 (subtraction property of equality)