Unknown Angle Proofs—Proofs of Known Facts

Lead the class in a Greek history lesson with a geometric twist. Pupils relate a short video about geometric properties to modern-day methods of solving for unknown angles. They discuss parallel line theorems and complete practice problems to present before their peers.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Locate additional video segments to provide further assistance with problem completion for this and previous lessons
Classroom Considerations
  • Present the video upon review of terms but before the class begins practice problems
  • Class should already understand that opposite parallelogram angles are equal in measure before starting this lesson
  • Resource 11 in a 36-part series
  • Includes a video to assist with integration of concepts presented
  • Contains a detailed explanation of parallel line and converse theorems to ensure complete understanding
  • None
Common Core