Writing equations of perpendicular lines

Consider the equation of the line is ax + by + c = 0 and coordinates are , the slope should be − ab If one line is perpendicular to this line, the

These slope values are not the same, so the lines are not parallel The slope values are also not negative reciprocals, so the lines are not perpendicular Then

perpendicular Perpendicular lines are represented using the symbol, '⊥' If lines l and m are perpendicular to each other, they intersect each other at

perpendicular At right angles to one another Can be of two lines, two planes, a line and a plane, or a line and a surface From: perpendicular in The Concise Oxford