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www.montereyinstitute.org/courses/Algebra1/COURSE_TEXT...

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.. Perpendicular lines are everywhere, not just on graph paper but also in the world around us, from the crossing pattern of roads at an intersection to the colored lines of a plaid shirt.

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

Parallel and Perpendicular Lines. 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 draw a perpendicular line and a rectangle using a protractor or a triangular ruler.

Perpendicular lines look like two straight lines that meet or intersect at a 90-degree angle. The capital letter T is an example of what they might look like.

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: Here also: (The little box drawn in the corner, means "at right angles", so we didn't really need to also show that it was 90°, but we just wanted to!). Try for yourself:

www.quora.com/What-does-a-perpendicular-line-look-like

Am angle is the figure between an initial side and the degree of rotation of its terminal side. A perpendicular angle is formed when the degree of rotation of the terminal side from the initial side is equal to 90. Thus, a perpendicular line looks...

Perpendicular lines are lines that intersect at a right (90 degrees) angle. Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect. Perpendicular lines are lines that intersect at a right (90 degrees) angle.

en.wikipedia.org/wiki/Perpendicular

A line is said to be perpendicular to a plane if it is perpendicular to every line in the plane that it intersects. This definition depends on the definition of perpendicularity between lines. Two planes in space are said to be perpendicular if the dihedral angle at which they meet is a right angle (90 degrees).