Interactive

Conjectures and Proof

Curated and Reviewed by Lesson Planet
This Conjectures and Proof interactive also includes:

Transform proofs using triangle rotations. By rotating a triangle around various points, class members develop proofs. Participants prove relationships of alternative interior angles formed by parallel lines and the sum of the interior angles of a pentagon.

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CCSS: Adaptable
Concepts
parallel lines with a transversal, alternate interior angles, congruence, congruent angles, transformations, angle of rotation, rotations, interior angles, pentagons
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Additional Tags
math
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Instructional Ideas
  • Create groups to share the sequences used to answer the questions
  • Demonstrate how to use each of the tools prior to the activity
Classroom Considerations
  • The class should be familiar with rotations as transformations
Pros
  • Provides initial directions on how to use the tools
  • Contains sliders for multiple rotations
Cons
  • None