Perpendicular lines

  • Thread starter cokefree
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  • #1
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Could some tell me whats the other way you could find if lines are perpendicular, other than graphing. I know another way to do it, and its algebracaly, but theres another way you could do it algebracaly too.
 

Answers and Replies

  • #2
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Find the slope for the two lines
Their product should be equal to -1 if the lines are perpendicular
 
  • #3
selfAdjoint
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Form a unit vector along each line, with components. Then do an inner product of the vectors to see if it's zero. Same work in a different dress.
 

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