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GeoGebra
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Stathis Koutras' proof of the Butterfly Theorem
Author:
user3208
GeoGebra
New Resources
Rotating Points (Optical Illusion)
Play C3 E3 G3 C4_C4
Piano. Keyboard.
Isosceles Triangle: Quick Construction
Teorema Japonês para quadriláteros inscritos em uma circunferência
Discover Resources
ΠΑΡΑΔΕΙΓΜΑ ΓΕΩΜΕΤΡΙΚΟΥ ΤΟΠΟΥ-3
Pythagorean
Triangle
parabola al variare dei parametri
Circle parabolas
Discover Topics
Square
Perimeter
Constructions
Pie Chart or Circle Chart
Conditional Probability