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Proof Without Words
Author:
Steve Phelps
Topic:
Plane Figures or Shapes
,
Pythagoras or Pythagorean Theorem
Drag the points. Drag the slider. What do you notice? What does this prove? How does this prove?
GeoGebra
New Resources
Poorly Drawn Parallelograms 2
Dissections by Guillermo Bautista
Average Rate of Change: Graph a Function (2)
Quiz: Finding Average Rate of Change
探究由平行線和截線所成的角
Discover Resources
Proportional squares and rectangles
A 3D generalization of Viviani's theorem
Triginimetry
india
Vectors as Complex Numbers Applet 3a
Discover Topics
Unit Circle
Functions
Random Variables
Percentages
Fractions