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Perpendicular

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 ...

Intro to parallel & perpendicular lines | Interpreting angles | Khan ...

www.khanacademy.org/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/v/parallel-and-perpendicular-lines-intro

Sal discusses how to tell if lines are parallel or perpendicular.

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

www.khanacademy.org/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/v/perpendicular-lines

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

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.

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!

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.

Perpendicular - math word definition - Math Open Reference

www.mathopenref.com/perpendicular.html

Perpendicular means "at right angles". A line meeting another at a right angle, or 90° is said to be perpendicular to it. In the figure above, the line AB is ...

Perpendicular lines. (Coordinate Geometry) - Math Open Reference

www.mathopenref.com/coordperpendicular.html

When two lines are perpendicular to each other (at right angles or 90°), their slopes have a particular relationship to each other. If the slope of one line is m then ...

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

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

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  ...

Perpendicular Lines - Geometry Made Easy! - Quatr.us

quatr.us/math/geometry/perpendicular.htm

May 31, 2016 ... May 2016 - Two lines are perpendicular if they cross at right angles. You can test this by extending the lines until they cross (if they do not cross ...

Answers
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