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# AA Similarity

## Two triangles are similar if two pairs of angles are congruent.

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.

## AA Similarity

by CK-12 //basic

Use the AA Similarity Postulate to determine if triangles are similar.

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## AA Similarity

This concept teaches students how to identify whether or not two triangles are similar using AA Similarity.

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## AA Triangle Similarity

Prove and use the AA criterion for triangle similarity.

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• PLIX

## AA Similarity

AA Similarity Interactive

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• PLIX

## AA Similarity

AA Similarity Interactive

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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

## AA Similarity Principles - Basic

by CK-12 //basic

This video provides the student with a walkthrough on AA similarity

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• Video

## AA Similarity Examples - Basic

by CK-12 //basic

This video provides the student with a walkthrough of one or more examples from the concept "AA Similarity".

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• Video

## AA Similarity Principles

This video gives more detail about the mathematical principles presented in AA Similarity.

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• Video

## AA Similarity Examples

This video shows how to work step-by-step through one or more of the examples in AA Similarity.

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• Video

## Similar Triangles Using Angle-Angle

by CK-12 //basic

Explains how to determine if two triangles are similar using AA similarity.

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• Interactive Exercise

## Are The Two Triangles Similar (part 2)?

Checks your understanding of proportional figures.

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• Interactive Exercise

## Which Similarity Theorem (part 2)?

Checks your understanding of similar triangles.

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• Interactive Exercise

## Which Type of Similarity (part 2)?

Checks your understanding of similar triangles.

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• Practice
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## AA Similarity Practice

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• Interactive Exercise

## How are Triangles Similar by AA?

Checks your understanding of AA Triangle Similarity.

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• Interactive Exercise

## Triangle AA Similarity True or False

Checks your understanding of AA Triangle Similarity.

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• Interactive Exercise

## Triangle AA Similarity and Proportionality True or False

Checks your understanding of AA Triangle Similarity.

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• Interactive Exercise

## Given Some Information About Two Triangles, Are They Similar

Checks your understanding of AA Triangle Similarity.

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• Interactive Exercise

## Given Some Information About Two Triangles, Are They Similar (part 2)

Checks your understanding of AA Triangle Similarity.

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• Interactive Exercise

## Given Two Triangles, Are They Similar?

Checks your understanding of similar triangles.

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• Interactive Exercise

## Are The Two Triangles Similar (part 2)?

Checks your understanding of proportional figures.

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• Interactive Exercise

## Similarity by AA, SSS or SAS?

Checks your understanding of how triangles can be similar.

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• Interactive Exercise

## Similarity Test True or False

Checks your understanding of the Similarity Test.

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• Interactive Exercise

## Which Similarity Theorem?

Checks your understanding of similar triangles.

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• Interactive Exercise

## Which Type of Similarity?

Checks your understanding of similar triangles.

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• Interactive Exercise

## Which Similarity Theorem (part 2)?

Checks your understanding of similar triangles.

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• Interactive Exercise

## Which Type of Similarity (part 2)?

Checks your understanding of similar triangles.

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• Critical Thinking

## AA Similarity Discussion Questions

A list of student-submitted discussion questions for AA Similarity.

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To stimulate the critical thinking skills required to assess the validity of statements about the key concept using an Agree/Disagree Table.

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To stress understanding of a concept by summarizing the main idea and applying that understanding to create visual aids and generate questions and comments using a Concept Matrix.

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## AA Similarity Four Square Concept Matrix

Summarize the main idea of a reading, create visual aids, and come up with new questions using a Four Square Concept Matrix.

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• Real World Application

## AAA Similarity

How do you measure the height of the great pyramid?

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• Real World Application

## Crazy Quilt

Find out how similar triangles are used in quilting.

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• Study Guide

## Polygon Similarity Study Guide

This study guide looks at similar polygons, scale factor (ratio), and triangle similarity.

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• Flashcards

## AA Similarity Flashcards

by CK-12 //basic

These flashcards help you study important terms and vocabulary from AA Similarity.

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