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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

## Perpendicular - Wikipedia

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 ...

## Perpendicular Lines 1 | Coolmath.com

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!

## Perpendicular lines from equation | Equations of parallel ...

We are asked which of these lines are perpendicular. And it has to be perpendicular to one of the other lines, you can't be just perpendicular by yourself .

## Parallel & perpendicular lines intro | Parallel and perpendicular ...

Parallel lines never intersect, and perpendicular lines intersect at a 90 degree angle. Learn how to identify parallel and perpendicular lines.

## Definition of Perpendicular Lines - Math is Fun

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.

## Slope: Parallel and Perpendicular Lines - Purplemath

www.purplemath.com/modules/slope2.htm

Demonstrates how to determine if slopes are parallel, perpendicular, or neither. Explains why graphing is not generally helpful for this type of question.

## How Do You Write an Equation of a Line in Slope-Intercept Form If ...

www.virtualnerd.com/algebra-1/linear-equation-analysis/parallel-perpendicular-lines/perpendicular-lines/slope-intercept-from-point-and-perpendicular-line

Want to find the slope-intercept form of a line when you're given a point on that line and another line perpendicular to that line? Remember, perpendicular lines  ...

## Parallel and Perpendicular Lines | Algebra 1 | Analyzing Linear ...

www.virtualnerd.com/algebra-1/linear-equation-analysis/parallel-perpendicular-lines/parallel-lines

How Do You Write an Equation of a Line in Slope-Intercept Form If You Have One Point and a Parallel Line? Want to find the slope-intercept form of a line when ...