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The Butterfly Theorem
Author:
Lamberto Lamberti
http://www.cut-the-knot.org/pythagoras/Butterfly.shtml
GeoGebra
New Resources
Roll 6d five times
Flip 4 Coins
Balls in an Urn
Untitled
Experiments with Transformations in the Plane
Discover Resources
Surface of Revolution 2
Forum_f=2&t=37926_D5_TiangleTorque
Problem 3 (1/31/17)
Untitled
LZ 6.6.12 The Genie's Offer
Discover Topics
Congruence
Quadratic Functions
Circle
Ellipse
Differential Equation