Exploring Congruence Using Transformations

Prove it—triangles aren't congruent unless you prove them to be congruent. High school mathematicians learn to prove triangle congruence by using transformations. They see how rigid motions result in congruent sides and angles.

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CCSS: Designed
Instructional Ideas

  • Challenge individuals to use different methods (compass and straightedge, patty paper, etc.) to prove congruence
Classroom Considerations

  • Learners should be able to perform transformations
  • Pupils must understand congruence in terms of rigid motions

  • Highlights some opportunities to provide feedback to pupils
  • Includes a very detailed instructional guide

  • None
Common Core