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The Butterfly Theorem
Author:
Lamberto Lamberti
http://www.cut-the-knot.org/pythagoras/Butterfly.shtml
GeoGebra
New Resources
Free fall
Silhouettes without gaps and isolated
Two-Way Tables and Ven Diagrams
Multiplication Area Model with Feedback: 2 Digit by 2 Digit Number
z`]]
Discover Resources
Angle in a Semi-circle 3
Circle pieces
Writing Linear Equations Given Slope & Point (V2)
Tape Diagram
perpendicular bisector
Discover Topics
Statistics
Similarity Transformation or Similarity
Natural Numbers
Boxplot
Variance