Angle in a Semi-Circle – Proof

This Angle in a Semi-Circle – Proof video also includes:

Young mathematicians observe a geometric proof using a short video. They see each part of the diagram clearly labeled and the simple math written off to the side. The new knowledge helps them solve additional problems independently.

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CCSS: Adaptable
Instructional Ideas

  • After watching the proof video, have pupils write it out in either two-column or paragraph form
  • Ask what would happen if students drew the triangle using a different point on top
Classroom Considerations

  • Relies on prior knowledge of circles and triangles

  • Works well in traditional or flipped classes
  • Includes an answer key

  • None
Common Core