1. Chapter 3.1 Properties of Parallel Lines

2. Vocabulary
Transversal – a line that intersects two coplanar lines at two distinct points.

3. Vocabulary
Interior angles – Angles that are in between the two lines cut by a transversal

4. Vocabulary
Exterior angles – Angles that are outside the two lines cut by a transversal

5. Vocabulary Alternate interior angles Angle 4 and 5 And Angle 3 and 6
are alternate interior angles

6. Vocabulary Alternate exterior angles Angle 1 and 8 And Angle 2 and 7
are alternate exterior angles

7. Vocabulary
Corresponding Angles – in the same position in terms of the transversal.
Angle 1 and 5
Angle 2 and 6
Angle 4 and 8
Angle 3 and 7
Are corresponding angles

8. On the exit slip….
Write your answers to the following questions

9. Question 1
Name two pairs of Same Side Interior Angles

10. Question2
Name two pairs of
Alternate Exterior Angles

11. Homework
Find a picture that contains an example of parallel lines and a transversal
from a magazine, newpaper.. Take a picture... Ect.
You can draw in the transversal if you need to.
On the example label:
The transversal
Interior angles
Exterior angles
Corresponding angles
(*bonus if you highlight the alternate and same side exterior and interior angles.)

12. Corresponding Angles Postulate
If a transversal intersects two parallel lines, then corresponding angles are congruent

13. Alternate Interior Angles Theorem
If a transversal intersects two parallel lines, then alternate interior angles are congruent

14. Same-Side Interior Angles Theorem
If a transversal intersects two parallel lines, then same side interior angles are supplementary

15. Alternate Exterior Angles Theorem
If a transversal intersects two parallel lines, then alternate exterior angles are congruent

16. Same-side Exterior Angles Theorem
If a transversal intersects two parallel lines, then same side exterior angles are supplementary

17. Parallelogram Problem