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Proof Without Words
Author:
Steve Phelps
Drag the points below. What do you notice? What does this prove? How does this prove it?
GeoGebra
New Resources
探究由平行線和截線所成的角
Shade a spheric triangle with "surface".
Rings of circles
aperiodic monotile construction_step by step
What is an Isogonal Conjugate?
Discover Resources
Hexagonal Prism
Linear Pair
Intro to GeoGebra
การบวกจำนวนเต็มกับจำนวนเต็มลบ
Parallel #4
Discover Topics
Calculus
Ellipse
Straight Lines
Limits
Integral Calculus