How to determine if lines are perpendicular in coordinate geometry. Hide details The line CD if it is perpendicular to AB has a slope of -1/0.5 or -2.
Given line A and point P, Sal finds the equation of the line perpendicular to A that want to know more details, check out this article https://en.wikipedia.org/wiki/
Sal proves that perpendicular lines have negative reciprocal slope using triangle similarity.
Use your knowledge about the slopes of parallel and perpendicular lines to solve some problems. For example, what's the equation of the line perpendicular to
Parallel and Perpendicular Lines. Two lines are parallel if one can be translated, without rotation, to lie on top of the other. Two lines are perpendicular if they