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What Are Perpendicular Lines?
In mathematics, a line is an infinitely long one-dimensional object. It has no start or end, continuing on forever without ever changing direction. More colloquially, a "line" is any straight object, even if it does have an end point. The relationship... More »
Difficulty: Easy
Source: www.ehow.com

en.wikipedia.org/wiki/Perpendicular

If two lines (a and b) are both perpendicular to a third line (c), all of the angles formed along the third line are right ...

www.coolmath.com/algebra/08-lines/14-perpendicular-lines-01

Let's graph these lines: * I'm using y = mx + b stuff to graph them!

www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/perpendicular-lines

Sal determines which pairs out of a few given linear equations are perpendicular.

www.mathsisfun.com/definitions/perpendicular-lines.html

Perpendicular Lines. more ... Perpendicular Lines. Lines that are at right angles ( 90°) to each other. Try for yourself: See: Parallel Lines. Next.

www.mathsisfun.com/perpendicular-parallel.html

Perpendicular and Parallel. Perpendicular. It just means at right angles (90°) to. The red line is perpendicular to the blue line in each of these examples:.

www.homeschoolmath.net/teaching/g/parallel_and_perpendicular.php

This lesson explains what are parallel and perpendicular lines and has varied exercises for the students. The lesson also includes a video where I show how to  ...

mathbitsnotebook.com/Geometry/Equations/EQPerpendicularLines.html

When lines intersect, the angles created by the intersection can be a valuable piece of information regarding the conditions surrounding the intersection point.

.ask.com/youtube?q=Perpendicular+Lines&v=0671cRNjeKI
Jun 12, 2010 ... U04_L2_T2_we1 : Perpendicular Lines More free lessons at: http://www. khanacademy.org/video?v=0671cRNjeKI Content provided by ...