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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)