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Stathis Koutras' proof of the Butterfly Theorem
Author:
user3208
GeoGebra
New Resources
Periodic Functions
Art and Rotational Symmetry
What is an Isogonal Conjugate?
Flag in the wind
Droste effect draft
Discover Resources
side bisectors
Central and Inscribed Angles
Segment Construction
paralleogram
Seeing Factors
Discover Topics
Piecewise Functions
General Quadrilateral
Conic Sections
Pie Chart or Circle Chart
Trapezoid