en.wikipedia.org/wiki/Perpendicular

In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a ... For example, by counting links, three pieces of chain can be made with ...

www.khanacademy.org/math/basic-geo/basic-geo-angle/angles-between-lines/v/identifying-parallel-and-perpendicular-lines

... never intersect. Perpendicular lines are lines that intersect at a right (90 degrees) angle. ... So, for example, line ST is perpendicular to line CD. So line ST is ...

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.montereyinstitute.org/courses/Algebra1/COURSE_TEXT_RESOURCE/U04_L2_T2_text_final.html

Perpendicular lines are two or more lines that intersect at a 90-degree angle, like the two lines drawn on this graph, and the x and y axes that orient them.

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

This lesson explains what are parallel and perpendicular lines and has varied ... For example, l ∥ m means l is parallel to m, and AB ⊥ CD means AB is ...

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Parallel Lines are distinct lines...complete information about parallel and perpendicular lines, definition of an parallel and perpendicular lines, examples of an ...

www.splashmath.com/math-vocabulary/geometry/perpendicular-lines

Definition of Perpendicular Lines explained with illustrated examples. Also, practice lots of math problems with fun math worksheets at Splash Math.

study.com/academy/lesson/what-are-perpendicular-lines-definition-meaning-quiz.html

Aug 29, 2015 ... In trigonometry, for example, perpendicular lines and properties of triangles can be used to calculate height and distances. If the objects used in ...

www.shmoop.com/parallel-perpendicular-lines/perpendicular-lines-examples.html

Perpendicular Lines Examples. BACK · NEXT. Example 1. If two lines intersect and one of the angles formed from the intersection is 90°, what is the ...

www.mathwarehouse.com/algebra/linear_equation/parallel-perpendicular-lines.php

How to identify parallel and perpendicular lines based on the slope. Parllel lines have the same ... Example of Perpendicular Lines. As you can see from the ...