In the figure, , and both lines are intersected by transversal t. Complete the statements to prove that ∠2 and ∠8 are supplementary angles. (given)

m∠2 = m∠7 (
)

m∠7 + m∠8 = 180° (
)

m∠2 + m∠8 = 180° (Substitution Property)

∠2 and ∠8 are supplementary (definition of supplementary angles)

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