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Parallel and Perpendicular Lines
Contributed by: Miles
(Original author: Schleper)
Parallel lines have slopes that are the same.

Perpendicular lines have slopes that are opposite reciprocals.
Parallel and 
Perpendicular Lines
This line has a slope of -5/4.
The slope of any line parallel tothis line is: 
This line has a slope of 4/3.
The slope of any line parallel tothis line is: 
What is the slope of this line?
This line has a slope of -2.
The slope of any line perpendicular to this line is: 
What is the slope of this line?
This line has a slope of 1/2.
The slope of any line parallel tothis line is: 
What is the slope of this line?
This line has a slope of 4.
The slope of any line perpendicular to this line is: 
What is the slope of this line?
The slope of any line perpendicular to this line is: 
The slope of any line parallel tothis line is: 
The slope of any line perpendicular to this line is
The slope of any line parallel tothis line is: 
The slope of any line perpendicular to this line is: 
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