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It just means at right angles (90°) to. The red

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In trigonometry, for

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How to identify parallel and

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This lesson explains what are parallel and

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May 31, 2016

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So for

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One common

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A general formula for finding the slope of a

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www.mathsisfun.com

How to use Algebra to find parallel and

www.icoachmath.com

Parallel Lines are distinct lines...complete information about parallel and

www.khanacademy.org

Sal identifies parallel and