Why Does SAS Work?

This Why Does SAS Work? activity & project also includes:

Your geometry learners are guided by questions that help them use the language of reflections to explain the Side-Angle-Side congruence between two triangles in this collaborative task. Given a sample solution, declaring the triangles congruent based on Side-Angle-Side congruence characteristics, they construct reflections as instructed until one triangle is mapped onto the other showing they are indeed congruent. 

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CCSS: Designed
Classroom Considerations

  • Have geometry construction tools like paddy paper, compass, and a straight edge accessible to all learners
Pros

  • Includes very detailed description of the solution
  • Helpful commentary for the teacher
Cons

  • None
Common Core