3. Proofs with Parallel Lines
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Use the Consecutive Interior Angles Converse.
Yes
Explanation: See solution.
We can determine if AC and DF are parallel lines by, for example, examining consecutive interior angles. According to the Consecutive Interior Angles Converse, we know that two lines cut by a transversal are parallel if a pair of consecutive interior angles are supplementary.
m∠ ABE= 143^(∘)
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