isabel61 isabel61
  • 07-03-2018
  • Mathematics
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Lines are perpendicular when the slopes are _____

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sqdancefan
sqdancefan sqdancefan
  • 07-03-2018
... negative reciprocals of each other.

___
Lines are perpendicular when the product of their slopes is -1 (or when one is vertical and the other is horizontal).
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