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# Third Angle Theorem

## Third angles are the same if the other two sets 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.

## Third Angle Theorem

This concept introduces students to the Third Angle Theorem.
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• Video

## The Third Angle Theorem Principles

This video gives more detail about the mathematical principles presented in The Third Angle Theorem.
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• Video

## The Third Angle Theorem Examples

This video shows how to work step-by-step through one or more of the examples in The Third Angle Theorem.
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• Video

## Third Angle Theorem

Shows how to use the third angle theorem to find a missing angle.
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## Third Angle Theorem Quiz

Third Angle Theorem quiz.
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• Critical Thinking

## Third Angle Theorem Discussion Questions

A list of student-submitted discussion questions for Third Angle Theorem.
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• Real World Application

## Third Angle Theorem

Who is better at parallel parking, men or women?
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• Study Guide