Select the correct answer from each drop-down menu. in the figure, , and both lines are intersected by transversal t. complete the statements to prove that m∠1 = m∠5. (given) m∠1 + m∠3 = 180° (linear pair theorem) m∠5 + m∠6 = 180° (linear pair theorem) m∠1 + m∠3 = ∠5 + ∠6 () m∠3 = m∠6 () m∠1 = m∠5 (subtraction property of equality)