Wednesday, November 4, 2009

3.3 Prove Lines are Parallel

Do Now:

1. What do we have to know first to use the the follow?

* Corresponding Angles Postulate
* Alternate Interior Angles Theorem
* Alternate Exterior Angles Theorem
* Consecutive Interior Angles Theorem


2. Write the converse of the following statement.

If it is raining, then Josh needs an umbrella.


4. How do you prove lines are parallel?




Example 1: Apply the converse theorems and postulate

Example 2: Transitive Property of Parallel Lines

Example 3: Using Algebra