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# Altitudes

## Height of a triangle or the line segment from a vertex and perpendicular to the opposite side.

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.

## Altitudes

This concept teaches students properties of altitudes of triangles and how to apply them.
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• PLIX

## Triangle Relationships

Altitudes Interactive
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• Video

## Altitudes Principles

This video gives more detail about the mathematical principles presented in Altitudes.
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## Altitudes Examples

This video shows how to work step-by-step through one or more of the examples in Altitudes.
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• Critical Thinking

## Altitudes Discussion Questions

A list of student-submitted discussion questions for Altitudes.
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• Real World Application

## RWAAltitude

What is high altitude? And how does altitude sickness work?
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• Study Guide