3.1.3 Proving that Lines are Parallel - Practice (continued)

5. Write a proof.

6. Write a proof.

Given: m ∠ 2 = (6 x + 28)°, m ∠ 6 = (11 x − 7)°, and x = 7 Prove: a || b

Given: m ∠ 4 = (14 x + 9)°, m ∠ 5 = (3 x + 18)°, and x = 9 Prove: p || q

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