1. Geometry Agenda 1. ENTRANCE 2. Go over Practice
Slopes of Parallel and
Perpendicular Lines
4. Practice Assignment
5. EXIT

2. Practice WB 3-5 # 1, 2, 9, 11, 19, 25, 26, 33

3. 3-6 Slopes of Parallel and Perpendicular Lines
Chapter 3
3-6 Slopes of Parallel and Perpendicular Lines

4. Parallel Lines Parallel lines have the same slope. ex: y = 3x + 5

5. Perpendicular Lines
Perpendicular lines have slopes that are opposite reciprocals. Their product is -1.
ex:
3 · -⅓ = -1

6. Example #1 Are these lines parallel, perpendicular, or neither?

7. Example #2
Are these lines parallel, perpendicular, or neither?

8. Example #3
Are these lines parallel, perpendicular, or neither?

9. Example #4 Are these lines parallel, perpendicular, or neither?

10. Example #5 Find the equation of a line parallel to
y = -x + 4 that contains the point (-2, 5).

11. Example #6 Find the equation of a line perpendicular to
5x + 2y = 1 that contains the point (10, 0).

12. Example #7 Find the equation of a line perpendicular to
y = ½x - 9 that contains the point (1, 7).

13. Example #8 Find the equation of a line parallel to
5y - x = 0 that contains the point (15, -4).

14. Example #9 Find the equation of a line perpendicular to
y = -⅔x + 15 that contains the point (2, 8).

15. Practice
WB 3-6 # 1, 2, 3, 9, 10, 11, 16, 18
EXIT