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# Comparing Equations of Parallel and Perpendicular Lines

Use slope to identify parallel and perpendicular lines
Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Comparing Equations of Parallel and Perpendicular Lines

Use their slopes to determine if two lines are parallel or perpendicular.

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## Determine Parallel and Perpendicular Lines: A Sample Application

This video demonstrates a sample use of identifying parallel and perpendicular lines.

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• Video

## Determine Parallel and Perpendicular Lines: An Explanation of the Concept

This video provides an explanation of the concept of identifying parallel and perpendicular lines.

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• Practice
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## Comparing Equations of Parallel and Perpendicular Lines Card Sort Activity

Sort out a jumble of key words into categories using the Card Sort strategy. This activity may help you to develop skills for remembering key words and concepts.

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