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# SAS Triangle Congruence

## Two sets of corresponding sides and included angles prove congruent triangles.

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

## SLT 25 Explore and apply Side Angle Side (SAS) criteria to prove triangle congruence.

by MCPS Math //at grade

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• Read

## SAS Triangle Congruence

by Rob Clarico //at grade

This concept introduces students to the SAS Triangle Postulate and how to prove that two triangles are congruent given only information about two pairs of sides and included angles.

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• Read

## Side-Angle-Side Triangle Congruence.

by Scott Lamie //at grade

This concept introduces students to the SAS Triangle Postulate and how to prove that two triangles are congruent given only information about two pairs of sides and included angles.

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• PLIX

## SAS Triangle Congruence

by CK-12 //at grade

SAS Triangle Congruence Interactive

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• PLIX

## Complete the Proof

by CK-12 //at grade

SAS Triangle Congruence Interactive

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• Video

## SAS Triangle Congruence Principles

by CK-12 //at grade

This video gives more detail about the mathematical principles presented in SAS Triangle Congruence.

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• Video

## SAS Triangle Congruence Examples

by CK-12 //at grade

This video shows how to work step-by-step through one or more of the examples in SAS Triangle Congruence.

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• Downloadable Quiz

## SAS Triangle Congruence Quiz

by CK-12 //at grade

Nine question quiz. Students must examine diagrams of triangles and the coordinates of triangles and determine if they are congruent using the SAS congruency theorem. Students must justify their reasoning. Students must also draw (on the coordinate plan) an example and non-example of triangles that can be proven congruent using the SAS theorem and then explain their reasoning.

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• Practice
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## SAS Triangle Congruence Practice

by CK-12 //at grade
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• Interactive Exercise

## Proof by Side Angle Side

by CK-12 //at grade

Checks your understanding of SAS proof method.

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• Interactive Exercise

## Acronym--SAS

by CK-12 //at grade

Checks your understanding of SAS proof method.

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• Interactive Exercise

## What's an Included Angle?

by CK-12 //at grade

Checks your understanding of SAS proof method.

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• Critical Thinking

## SAS Triangle Congruence Discussion Questions

by CK-12 //at grade

A list of student-submitted discussion questions for SAS Triangle Congruence.

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• Pre Read

## SAS Triangle Congruence Pre Read

by CK-12 //at grade

To activate prior knowledge, make personal connections, reflect on key concepts, encourage critical thinking, and assess student knowledge on the topic prior to reading using a Quickwrite.

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• Post Read

## SAS Triangle Congruence Post Read

by CK-12 //at grade

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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• Pre and Post Read

## SAS Triangle Congruence KWL Chart

by CK-12 //at grade

With this KWL Chart, reflect on your prior knowledge of a concept, come up with questions you’re curious about, and come up with answers from the reading.

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• Real World Application

## SSS Triangle Congruence

by CK-12 //at grade

Do a hands on activity to help conceptualize 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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