1. GEOMETRY 3-1 Lines and Angles

2. Vocabulary

3. Examples Identify each of the following. a. a pair of parallel segments b. a pair of skew segments d. a pair of parallel planes c. a pair of perpendicular segments

4. Vocabulary Transversal: A line that intersects two coplanar lines at two different points. Transversal

5. Vocabulary Corresponding angles: Lie on the same side of the transversal and on the same sides of the other two lines. Corresponding

6. Vocabulary Alternate Interior Angles: Nonadjacent angles that lie on opposite sides of the transversal and between the other two lines. Alternate Interior

7. Vocabulary Alternate Exterior Angles: Lie on opposite sides of the transversal and outside the other two lines. Alternate Exterior

8. Vocabulary Same-Side Interior: Lie on the same side of the transversal and between the two lines. Same-side Interior

9. Examples Give an example of each angle pair. A. corresponding angles B. alternate interior angles C. alternate exterior angles D. same-side interior angles

10. More Examples Identify the transversal and classify each angle pair. A. 1 and 3 B. 2 and 6 C. 4 and 6 transversal l corr. s transversal n alt. int s transversal m alt. ext s