www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/perpendicular-lines
And perpendicular line, just so you have a visualization for what for perpendicular lines look like, two lines are perpendicular if they intersect at right angles. So if ...
www.splashlearn.com/math-vocabulary/geometry/perpendicular-lines
In geometry, a branch of mathematics, perpendicular lines are defined as two lines that meet or intersect each other at right angles (90°). Perpendicular Lines ...
www.splashlearn.com/math-vocabulary/geometry/perpendicular
Perpendicular - Definition with Examples · These lines always intersect at right angles. · If two lines are perpendicular to the same line, they are parallel to each...
www.mathsisfun.com/definitions/perpendicular-lines.html
Illustrated definition of Perpendicular Lines: Lines that are at right angles (90deg) to each other. Try for yourself:
www.mathsisfun.com/algebra/line-parallel-perpendicular.html
Perpendicular Lines. Two lines are Perpendicular when they meet at a right angle (90°). To find a perpendicular slope: When one line has a slope of m, ...
www.mathplanet.com/education/algebra-1/formulating-linear-equations/parallel-and-perpendicular-lines
If two non-vertical lines in the same plane intersect at a right angle then they are said to be perpendicular. Horizontal and vertical lines are perpendicular to each ...
www.varsitytutors.com/hotmath/hotmath_help/topics/perpendicular-lines-and-slopes
Perpendicular Lines and Slopes. Perpendicular lines are lines that intersect at right angles. If you multiply the slopes of two perpendicular lines in the plane, you ...
www.varsitytutors.com/act_math-help/lines/coordinate-geometry/geometry/perpendicular-lines
First, put the equation of the line given into slope-intercept form by solving for y. You get y = -2x +5, so the slope is –2. Perpendicular lines have opposite- reciprocal .....
en.wikipedia.org/wiki/Perpendicular
A line is said to be perpendicular to another line if the two lines intersect at a right angle. Explicitly, a first line is ...
mathbitsnotebook.com/Geometry/ParallelPerp/PPperp.html
Two lines are perpendicular if and only if they form a right angle. Perpendicular lines (or segments) actually form four right angles, even if only one of the right ...