Teacher Resources

## Collection Contents

### Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

by Allen Wolmer

Exercises from Illustrative MathematicsA set of 11 exercises, commentary, and solutions
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### Students indirectly solve for measurements involving right triangles using scale factors, ratios between similar figures, and ratios within similar figures.

by Allen Wolmer

Teacher and Student versions of full lesson from engageNY
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### AA Similarity

by Allen Wolmer

AA SimilarityWhat if you were given a pair of triangles and the angle measures for two of their angles? How could you use this information to determine if the two triangles are similar? After completing this Concept, you'll be able to use AA Similarity to decide if two triangles are similar.Lessons, videos, exercises, and text from CK-12. Additional resources available at this site.
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### Inscribed Similar Triangles

by Allen Wolmer

Lessons, videos, exercises, and text from CK-12. Additional resources available at this site.
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