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Pythagoras Proof
Author:
Volker Schroeter
A purely geometric proof with Transformation Geometry, no Algebra required
GeoGebra
...but is makes a nice case for an Algebra exercise :-)
New Resources
What is an Isogonal Conjugate?
alg2_05_05_01_applet_exp_flvs
alg2_05_05_01_applet_exp_2_flvs
Average Rate of Change: Graph a Function (1)
探究由平行線和截線所成的角
Discover Resources
p1 frame
Trig Ratio Explore
Median of a triangle
المساقط
Logarithmic Action!
Discover Topics
Sphere
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Binomial Distribution