# Congruent Triangles

## Sides and angles have the same size.

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.
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## Congruent Triangles

by CK-12 //at grade
This concept teaches students what it means for two triangles to be congruent and how to identify corresponding parts of congruent triangles.
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• PLIX

## Congruent Triangles

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Congruent Triangles Interactive
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• Video

## Congruent Triangles Principles

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

by CK-12 //at grade
This video shows how to work step-by-step through one or more of the examples in Congruent Triangles.
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• Critical Thinking

## Congruent Triangles Discussion Questions

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

## Domes and Homes

by CK-12 //at grade
Find out how you can build structurally efficient domes from triangles.
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• Real World Application

## Congruent Triangles

by CK-12 //at grade
How did the Egyptians build pyramids made up perfect congruent triangles?
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• Study Guide

## Triangle Congruence Study Guide

by CK-12 //at grade
This study guide is an overview of triangle congruence: defining corresponding parts of congruent triangles, postulates and theorems for congruences (SSS, SAS, AAS, ASA), and postulates and theorems for congruences for special triangles.
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