Parallel Lines and Transversals Notes

Parallel Lines and Transversals

​Parallel lines

​lines that lie in the same plane and do not intersect

​Transversal

​a line that intersects 2 or more lines

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​Line a intersects both lines l and m, therefore it is the transversal

​If 2 parallel Lines are cut by a transversal, then...

• ​alternate interior angles are congruent

• ​alternate exterior angles are congruent

• ​corresponding angles are congruent

• ​same-side (consecutive) interior angles are supplementary

​If 2 parallel Lines are cut by a transversal, then...

• ​alternate interior angles are congruent

​If 2 parallel Lines are cut by a transversal, then...

• ​alternate exterior angles are congruent

​If 2 parallel Lines are cut by a transversal, then...

• ​corresponding angles are congruent

​If 2 parallel Lines are cut by a transversal, then...

• ​same-side (consecutive) interior angles are supplementary