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Butterfly wing and the Golden Ratio...
Author:
Tom Ahlschwede
GeoGebra
New Resources
רישום חופשי
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Circle Passing Through 3 Points
Reflection across a line
Reflection Across 2 Parallel Lines
Discover Resources
Stathis Koutras' proof of the Butterfly Theorem
Geometry II Advanced Activity
H - Obtuse triangle-a
Flower with triangles
A problem involving dot product
Discover Topics
Straight Lines
Real Numbers
Polygons
Special Points
Pyramid