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# Indirect Proof in Algebra and Geometry

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.

## Indirect Proof in Algebra and Geometry

This concept teaches students how to write an indirect proof and provides examples of indirect proofs in Algebra and Geometry.
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## Indirect Proof Principles

This video gives more detail about the mathematical principles presented in Indirect Proof.
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## Indirect Proof Examples

This video shows how to work step-by-step through one or more of the examples in Indirect Proof.
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• Critical Thinking

## Indirect Proof in Algebra and Geometry Discussion Questions

A list of student-submitted discussion questions for Indirect Proof in Algebra and Geometry.
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• Real World Application

## A Proof of Innocence

If you are confused about indirect proofs, here's an example of indirect reasoning in a real life setting!
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• Real World Application

Learn how lawyers use indirect proof in the courtroom.
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• Study Guide