# 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.

## Congruent Triangles

by CK-12 //basic
Determine whether two triangles are congruent.
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## Congruent Triangles

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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## Congruent Triangles

Determine whether two triangles are congruent.
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## Congruent Triangles.

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

Congruent Triangles Interactive
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• Video

## Congruent Triangle Proof Example

by CK-12 //basic
This video shows you just one of the many examples a triangle may be congruent, via the AAS rule.
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• Video

## Congruent and Similar Triangles

by CK-12 //basic
Explains congruent and similar triangles. Shows how to determine if triangles are similar.
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• Video

## Congruent Triangles Principles - Basic

by CK-12 //basic
This video provides the student with a walkthrough on congruent triangles.
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• Video

## Congruent Triangles Examples - Basic

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

## Congruent Triangles Principles

This video gives more detail about the mathematical principles presented in Congruent Triangles.
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• Video

## Congruent Triangles Examples

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

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

## Domes and Homes

Find out how you can build structurally efficient domes from triangles.
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• Real World Application

## Congruent Triangles

How did the Egyptians build pyramids made up perfect congruent triangles?
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• Study Guide

## Triangle Congruence Study Guide

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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