Instructional Video

Cyclic Quadrilateral – Proof

Curated and Reviewed by Lesson Planet
This Cyclic Quadrilateral – Proof instructional video also includes:

What do you call a quadrilateral in danger? A peril-lelogram! Scholars avoid danger by proving the opposite angles in a quadrilateral add up to 180 degrees. After viewing a brief video, they complete textbook exercises and a practice worksheet.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Challenge scholars to find another method to prove the opposite angles
  • Add this theorem to pupil's math journals with the other often referenced theorems
Classroom Considerations
  • Relies on prior knowledge of circles, quadrilaterals, and angles
Pros
  • Video allows sharing in multiple formats
  • Uses high-contrast colors to help the visually impaired
Cons
  • None
Common Core