Mathematics, 09.11.2019 12:31 22haydeabiy
The product of the slopes of two non-vertical perpendicular lines is always -1. it is not possible for two perpendicular lines to both have a positive slope because the product of two positives is positive. so for the product of the slopes to be -1, one of the slopes must be positive and the other negative.
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The product of the slopes of two non-vertical perpendicular lines is always -1. it is not possible f...
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