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Parallel Lines and the Transversal
|alternate exterior angles
|outside the parallel lines and are on opposite sides of the transversal.They are congruent.
|alternate interior angles
|inside the parallel lines, opposite sides of the transversal; they are congruent
|Angles on same side of the transversal and parallel lines; they are congruent
|two angles who sum is 180 degrees
|a pair of angles that form a straight line. They are supplementary.
|a pair of opposite angles formed by intersecting lines. They are congruent.
|lines that never intersect
|A line that cuts across two (or more) parallel lines.
|two angles whose sum equals 90 degrees
|The point where two lines meet
|same side interior angles
|angles that are inside the parallel lines and on the same side of the transversal; they are supplementary