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How does anyone know how to prove parallel lines, especially when there are two pairs of them?

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Answer:

Explanation:

If two lines are cut by a transversal so that any pair of alternate interior angles are congruent, then the lines are parallel. If two lines are cut by a transversal so that any pair of corresponding angles are congruent, then the lines are parallel. You can use these converses to decide whether two lines are parallel.

User Harshad Yeola
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