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15 Proof Without Words
Author:
Linda Bollman
,
Steve Phelps
Drag the points. Drag the slider. What do you notice? What does this prove? How does this prove?
GeoGebra
New Resources
Viviani's Curve
Pathway to Proof: Triangle Angles
Building Trapezoids with Set Areas
Rose Curve
Angle Addition: Warm Up Exercises
Discover Resources
Rule 5: Base angles of isosceles triangle
Morphing squares
Investigating the tri. ratio
Right Triangle Exploration Project
Discover Topics
Geometric Transformations
Vectors
Surface
Hypothesis Testing
Similar Triangles