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Proof Without Words

Author:Samantha Ewart, Steve Phelps
Drag the points. Drag the slider.

What did you notice? What does this prove? How does it prove it?

New Resources

  • Fractal Tétraèdre. Dilatation -1/2 centre triangles
  • Graph of Slopes of Tangent Lines
  • Regular Star Polygons
  • The Geometry of the Coefficients of a Quadratic Function
  • רישום חופשי

Discover Resources

  • Ladder against the Wall
  • Geo-Vince
  • M1-17
  • Ruiz_Period1_Rotations
  • Special Right Triangles Practice

Discover Topics

  • Parallelogram
  • Linear Programming or Linear Optimization
  • Circumcircle or Circumscribed Circle
  • Function Graph
  • Similarity Transformation or Similarity
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