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# Triangle Inequality Theorem

## Sum of the lengths of any two sides of a triangle is greater than the third 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.
• Read

## Triangle Inequality Theorem

by CK-12 //basic
Apply the Triangle Inequality Theorem to determine if three side lengths make a triangle.
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• Read

## Triangle Inequality Theorem

by CK-12 //at grade
This concept teaches students the Triangle Inequality Theorem and how to apply it.
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• PLIX

## Triangle Inequality Theorem

by CK-12 //at grade
Triangle Inequality Theorem Interactive
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• Video

## Triangle Inequality Theorem Principles - Basic

by CK-12 //basic
This video provides the student with a walkthrough on the Triangle Inequality Theorem.
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• Video

## Triangle Inequality Theorem Examples - Basic

by CK-12 //basic
This video provides the student with a walkthrough of one or more examples from the concept "Triangle Inequality Theorem".
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• Video

## Triangle Inequality Theorem Principles

by CK-12 //at grade
This video gives more detail about the mathematical principles presented in Triangle Inequality Theorem.
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• Video

## Triangle Inequality Theorem Examples

by CK-12 //at grade
This video shows how to work step-by-step through one or more of the examples in Triangle Inequality Theorem.
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• Video

## Triangle Inequality Theorem

by CK-12 //basic
States and investigates the triangle inequality theorem.
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• 0
• Critical Thinking

## Triangle Inequality Theorem Discussion Questions

by CK-12 //at grade
A list of student-submitted discussion questions for Triangle Inequality Theorem.
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• Real World Application

## Triangle Inequality Theorem

by CK-12 //at grade
How long ago was the triangle inequality theorem first written down?
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• Study Guide

## Inequalities in Triangles Study Guide

by CK-12 //at grade
This study guide is an overview of the triangle inequality theorem and hinge theorem.
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• Flashcards

## Triangle Inequality Theorem Flashcards

by CK-12 //basic
These flashcards help you study important terms and vocabulary from Triangle Inequality Theorem.
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