# How to Prove a Square Is Perpendicular?

A square is a quadrilateral shape that has four sides of equal length and four right angles. It may seem easy to identify a square by sight, but the only way to be sure is to measure it. One method...
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http://www.ehow.com/how_8518169_prove-square-perpendicular.html

## What does it mean to be perpendicular?

For two objects to be perpendicular, they must intersect or meet at a right angle (90 degrees). On a coordinate plane, to be perpendicular means that the slope of one line will equal the negative r...
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http://www.answerbag.com/q_view/2098246

## How to Know If a Vector Is Perpendicular?

Perpendicular vectors on a graph cross each other at 90 degree angles. If you have a printed graph and a protractor or T-square, you can measure the angles of intersection manually to determine if ...
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http://www.ehow.com/how_8508181_vector-perpendicular.html

## How to Align Yourself to the Perpendicular?

Alignment to the perpendicular should be a constant conscious tickle buried at the bottom of your awareness. Especially if you spend much time in front of a computer, this natural posture can becom...
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http://www.wikihow.com/Align-Yourself-to-the-Perpendicular

## How to Create Perpendicular Lines?

Perpendicular lines intersect each other to create four 90-degree angles. While it would be fairly easy to create some lines that are roughly perpendicular, if you want to create perfectly perpendi...
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http://www.ehow.com/how_8456578_create-perpendicular-lines.html