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September 20, 2014

September 20, 2014

Posted by **Patrick** on Wednesday, February 27, 2008 at 2:08am.

- Algebra -
**Vanessa**, Wednesday, February 27, 2008 at 2:53amyou can find the slope of the two lines...when it is perpendicular

m1*m2=-1

m1=one of the slope

m2=the second slope

if you multiply the slopes together, you will get -1 if it is perpendicular.

- Algebra -
**drwls**, Wednesday, February 27, 2008 at 2:53amMultiply the slope of one by the slope of the other. If the product is -1, they are perpendicular.

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