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31 December, 09:31

If two lines are perpendicular, how are their slopes related?

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  1. 31 December, 11:25
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    If two lines are perpendicular and neither one is vertical, then one of the lines has a positive slope, and the other has a negative slope ... Theorem 105: If two nonvertical lines are perpendicular, then their slopes are opposite reciprocals of one another, or the product of their slopes is - 1.
  2. 31 December, 11:55
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    The slopes will be opposite reciprocals.

    This means that they will be the opposite sign and the reciprocal.

    For example, if the slopes of 2 eqautions are 3 and - 1/3, they are perpendicular.
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