1. Angles Formed by Parallel Lines and Transversals 3-2
Warm Up
Lesson Presentation
Lesson Quiz
Holt Geometry

2. Warm Up
Identify each angle pair.
1. 1 and 3
2. 3 and 6
3. 4 and 5
4. 6 and 7

3. Objective
Prove and use theorems about the angles formed by parallel lines and a transversal.

4. Note 36 Angle Pairs with Parallel Lines Corresponding
Alternate Interior
Alternate Exterior
Same Side Interior

5. Example 1: Finding Angle Measures
Note 36
Example 1: Finding Angle Measures
Find each angle measure.
A. mECF
B. mDCE

6. Check It Out! Example 1
Find mQRS.

7. If a transversal is perpendicular to two parallel lines, all eight angles are congruent.
Helpful Hint

8. Example 2: Finding Angle Measures
Find each angle measure.
A. mEDG
B. mBDG