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O A. Vertical angles are congruent.
O B If two lines are parallel, then alternate exterior angles are congruent.
O C. If two lines are parallel, then alternate interior angles are congruent.
O D Corresponding angles theorem.

O A Vertical angles are congruent O B If two lines are parallel then alternate exterior angles are congruent O C If two lines are parallel then alternate interi class=

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iilovelysoto35

The answer to this question is A

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