# 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

## 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 Find Perpendicular Bisectors?

A perpendicular bisector is not just another "X" that marks the spot. A perpendicular bisector cuts a line segment into two equal lengths. The bisector also creates four right angles at the interse...
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http://www.ehow.com/how_8071646_perpendicular-bisectors.html

## How to Find a Perpendicular Line?

If a line intersects another line at a 90-degree angle, they are perpendicular. You may have to find a perpendicular line as a part of a high school or college algebra or geometry course. You also ...
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http://www.ehow.com/how_8274592_perpendicular-line.html