1. Warm Up Write the equation of a line that passes through the points (1, -11) and (5, -7). Then find the line parallel to it that passes through the point (10, 3). Find the angle measures of the five angles. Be careful, it’s not as easy at it looks. A B CD 155 ° ∠1∠1 65 ° 40 ° 115 ° ∠2∠2 ∠3∠3 ∠4∠4 ∠5∠5

2. Geometry Perpendicular Lines

3. Learning Outcomes I will be able to write the equation of a line that is perpendicular to another line and goes through a given point!

4. Activity

5. What does this mean?

6. How can we find a line perpendicular to y = 2x + 1? What if we wanted to find a line perpendicular to y = 2x +1 but through the point (3, 4)?

7. Let’s put this all together! Find the slopes of both lines, then determine if they are perpendicular.

8. Are these lines perpendicular? Set I Set II

9. Challenge Problem Find a line perpendicular to the line on the left through the point P.

10. VOCAB QUIZ NEXT CLASS! Exit Ticket Pg. 175: 10-16, 21-36, 38-41, 47-50, 55-62 Homework