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Proof Without Words
Author:
Steve Phelps
Topic:
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
Witch of Agnesi - A Classical Construction
Introduction
"Compressed" Astroid as Envelope
Rotating Points (Optical Illusion)
Angles and Intersecting Lines: Quick Investigation
Discover Resources
The centroid divides each of the medians in the ratio 2:1
ElevatorDoor
Background image bug
Anticevov trikotnik/Anticevian triangle
S3 centres(centroid)
Discover Topics
Tangent Function
Sine
Translation
Rotation
Ratios