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BT4_tr99
Author:
Huỳnh Văn Đèo
GeoGebra
New Resources
Ellipse, Hyperbola and Circle as Envelopes
Ellipse as Envelope - Correspondence Method
Drag that Point!
Witch of Agnesi - A Classical Construction
"Compressed" Astroid as Envelope
Discover Resources
tessellation 1
Transformation Reflection
Location of the midpoint of a segment
Applying the First derivative test
COSMOS puzzles - Can you fit it?