2.8 Vocab: Same Side Interior Angles and Same Side Exterior Angles Theorems
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Perpendicular-Parallel Line Theorem
If a coplanar line is perpendicular to one of two parallel lines, it is perpendicular to the other .
Same-Side Exterior Angle Theorem
If two parallel lines are cut by a transversal, then same-side exterior angles are supplementary.
Same-Side Interior Angle Theorem
If two parallel lines are cut by a transversal, then the same-side interior angles are supplementary.
