Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Lesson 10 (PH Text 5.6): Parallel and Perpendicular Lines
Objective: to use slope to determine if lines are parallel, perpendicular, or neither
to write equations of parallel or perpendicular lines
Discovery: Graph the following lines from the given points.
Line 1 ( –3, –2 ) and ( 1, 4 )
Line 1 ( 1, 4 ) and ( 3, –2 ) Line 2 ( 0, –6 ) and ( 4, 0 )
Line 2 ( –1, 1 ) and ( 5, 3 )
m1 = m1 =
m2 = m2 =
These lines are ________________________.
These lines are ______________________.
Feb 9­12:32 PM
1
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Take Note:
Parallel Lines (||) have slopes that are ____________. (y­intercepts must be different)
Perpendicular Lines (⊥) have slopes that are _________________________________. (lines must intersect)
Find the slope of a line parallel to the graph of each equation.
6x + 2y = 4
y – 3 = 0
­5x + 5y = 4
Feb 9­12:35 PM
2
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Feb 22­9:21 AM
3
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Feb 22­9:26 AM
4
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Feb 22­9:32 AM
5
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Write an equation for a line that contains ( –2, 3 ) and is parallel to the graph of 5x – 2y = 8.
Feb 9­12:36 PM
6
Lesson 10 parallel and perpendicular lines.notebook
February 22, 2016
Feb 22­9:41 AM
7