# Properties of Equality and Congruence

## Logical rules that allow equations to be manipulated and solved.

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.

## Properties of Equality and Congruence

by CK-12 //basic
Use equality and congruence properties.
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## Properties of Equality and Congruence Principles - Basic

by CK-12 //basic
This video provides the student with a walkthrough on the properties of equality and congruence.
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## Properties of Equality and Congruence Examples - Basic

by CK-12 //basic
This video provides the student with a walkthrough of one or more examples from the concept " Properties of Equality and Congruence".
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## Introduction to Proof Using Properties of Equality

by CK-12 //basic
An introduction to proofs using properties of equality. James Sousa shows how to write a simple 2-column proof for a geometric equation.
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## Introduction to Proof Using Properties of Congruence

by CK-12 //basic
An introduction to proofs in geometry using a two column proof and properties of congruence.
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