1. Parallel Lines and Planes Dallas City Hall I.M. Pei Parthenon Athens Havasu Falls I.M. Pei Lesson 3.2 Classroom Exercises

2. Mr. Sabia’s Favorite Theorem Vertical angles are congruent. X marks the spot.

3. Mr. Sabia’s 2nd Favorite Theorem Linear pairs are supplementary. Lp’s are suppl. ab

4. Mr. Sabia’s Third Favorite Theorem If 2 lines are //, then the Alternate Interior angles are congruent.

5. If two lines are parallel…. The corresponding angles are congruent. The alternate interior angles are congruent. The alternate exterior angles are congruent. The same-side interior angles are supplementary. The same-side exterior angles are supplementary.

6. 1 If a//b, name all angles that must be congruent to angle 1

7. 2 If c//d, name all angles that must be congruent to angle 1

8. 3 Assume a//b and c//d. Name all angles that must be congruent to angle 2

9. 4 Assume a//b and c//d. Name all angles that must be supplementary to angle 2

10. 5 Assume a//b and c//d. 110 70

11. 6 Assume a//b and c//d. 110 x180-x 70 x x

12. 7

13. 8

14. 9

15. 10

16. 11

17. 12

18. 13 Given: Transversal t cut L and N Given Substitution property L N t 1 2

19. 14

20. y + 56 + 24 = 180

21. 15

22. 16

23. C’est fini. Good day and good luck.