3-5 Practice Proving Lines Parallel Given the following information, determine which lines, if any, are parallel. State the postulate or theorem that justifies your answer. 1. + = 180 2. ∠CBF ∠GFH m∠BCG m∠FGC ≅ ∠EFB ∠FBC ∠ACD ∠KBF 3. 4. ≅ ≅ Find so that . Identify the postulate or theorem you used. x 5. 6. 7. 8. PROOF Write a two-column proof. Given: ∠2 and ∠3 are supplementary. Prove:
3-5 Practice Proving Lines Parallel Given the following information, determine which lines, if any, are parallel. State the postulate or theorem that justifies your answer. 1. m∠BCG + m∠FGC = 180 2. ∠CBF ≅ ∠GFH 3. ∠EFB ≅ ∠FBC 4. ∠ACD ≅ ∠KBF Find x so that . Identify the postulate or theorem you used. 5. 6. 7. 8. PROOF Write a two-column proof. Given: ∠2 and ∠3 are supplementary. Prove:
3-5_practice_proving_lines_parallel.docx