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Question: proofshow detail two lines are parallel and we have a...

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PROOF-Show detail.

Two lines are parallel and we have a non-perpendicular transversal. We assume conjecture 1 holds, which states that same-side interior angles are supplementary.

We can assume conjecture 2 holds, which states that alternate interior angles are congruent.

We cannot use alternate exterior angles are congruent and corresponding angles are congruent.

PROOF: Alternate exterior angles are congruent.

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