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Question

how can you tell in geometry that the equations are parallel, perpendicular , neither, either?
15 years ago

Answers

Reiny
If the slopes of the lines are equal, the lines are parallel
if the slopes are negative reciprocals of each other, the lines are perpendicular, ( e.g. 5/3 vs -3/5)

15 years ago
bignig
parell is when lines are black
9 years ago

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