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# Thm Chap 2-3

### Theorems from Chapters 2-3

All right angles are congruent Right Angles Congruence Theorem
If two lines are cut by a transversal and co-interior angles are supplementary, then the two lines are parallel Co-Interior Angles Converse
If two lines are parallel to the same line, then they are parallel to each other Transitive for Parallel Lines
Vertical Angles are congruent Vertical Angles Congruence Theorem
If two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent Alternate Interior Angles Congruent
If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent Alternate Exterior Angles Congruent
If two parallel lines are cut by a transversal, then the consecutive interior (co-interior) angles are supplementary Consecutive Interior (Co-Interior) Angles Supplementary
If two lines are cut by a transversal and alternate interior angles are congruent, then the two lines are parallel Alternate Interior Angles Converse
If two lines are cut by a transversal and alternate exterior angles are congruent, then the two lines are parallel Alternate Exterior Angles Converse
Created by: warnockj

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