Section 3-2

In section 2-3 we learned about five different theorems and postulates for transversals



Alternative Interiorior and Exterior Theorums:
This states that so long as there are two parallel lines that are split by a transversal then the Alternate interior angles of those two parallel lines are congruent to each other. The same is true for Alternate exterior angles


Corresponding angles Postulate:
This one states that corresponding angles are congruent, so long as they are on two parrallel lines that are split by a transversal. At right is a picture showing two corresponding angles that are congruent.









Consecutive Interior Angles Theorem:
Consecutive Interior angles are supplementary so long as they are on two parellel lines that are split by a transversal. This means that the sum of both he consecutive interior angles is 180 degrees. To the right is an example.




Perpendicular transversal theorem:
States that if a transversal is perpendicular to one of two parallel lines then it is perpendicular to the other one. example shown below