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SAS Similarity

Triangles are similar if two pairs of sides are proportional and the included angles are congruent.

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AAA Similarity
Teacher Contributed

RWA AA Similarity


Great Pyramids


  • AA Similarity
  • SSS Similarity
  • SAS Similarity
  • Proportions

Student Exploration

How do you measure the height of the great pyramid?

Watch the video to learn more.

Extension Investigation

  1. How to build a great pyramid scale of wood http://www.youtube.com/watch?v=zyWbsY_rBVo&feature=fvwrel
  2. Students will look for objects they think are similar and then prove the objects are similar using the three similarity shortcuts. http://www.schooltube.com/video/97c94c7a1ef9c971e364/

Layering (optional)

Movie Making/ Congruence vs Similarity


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