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Author:
Steve Phelps
GeoGebra
New Resources
Ellipse as Envelope - Correspondence Method
Angles and Intersecting Lines: Quick Investigation
Bottema's Theorem
Ellipse, Hyperbola and Circle as Envelopes
Pelecoid
Discover Resources
Supplementary Angles
Transversal Intersects Parallel Lines
Seagulls and Sharks
Reg 23.05.2019
Concave Hexagon
Discover Topics
Root
Diagrams
Polynomial Functions
Differential Equation
Rotation