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| Math Central | Quandaries & Queries |
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Question from Brendon, a student: points A (-4; 6) , B (1;-2), C (5;-3) and D (4; 1) are given prove that AC and BD are perpendicular to each other |
Hi Brendon,
Find the slopes of the line through AC and the line through BD. What property of the slopes of lines proves the lines are perpendicular?
Penny
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