Lines are perpendicular when the slopes are _____

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asked Apr 12, 2019 160k views

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Giacomo Penuti · Answer 1 · 2019-04-18T06:00:38+0000

... negative reciprocals of each other.

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

Lines are perpendicular when the slopes are _____

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