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Top suggestions for Find a Slope Perpendicular to Another Line
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Find the Slope
of Each Line
How to Find the Slope
of a Tangent Line
How to Find the
Slope of a Line
How to Find the Slope
of a Line with 2 Points
Find the Equation of
a Line
Finding the
Slope of a Line
How Do You Find the
Slope of a Line
How to Find Slope
From a Graph
How to Find Slope
From Two Points
8:55
Khan Academy
Proof: perpendicular lines have negative reciprocal slope
To prove that perpendicular lines have opposite reciprocal slopes, draw the two lines and label key points. By identifying the two right triangles that are formed, one can use the definition of slope to calculate the slopes of the two lines. Finally, using the properties of similar right triangles, show that the two slopes are indeed opposite ...
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