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Proof Without Words
Author:
Steve Phelps
Drag the points. What do you notice? What does this prove? How does this prove?
GeoGebra
New Resources
Probability and Geometry
Flag in the wind
Wallace-Simson Line, Orthopole, and Deltoid
Thin Slice: Using Trig Ratios to Solve for R.Triangle Sides
Pyramids to Cube
Discover Resources
Perimeter of Surfaces
Triangle and Parallel Lines
Trigonometry_LC
déformation d'un damier
Vertically Opposite Angles
Discover Topics
Right Triangles
Tangent Line or Tangent
Straight Lines
Symmetry
Percentages