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平面與直線
Author:
蕭富偉
GeoGebra
New Resources
"Compressed" Astroid as Envelope
Simplifying Radicals: Geometric Thin Slice
Ellipse, Hyperbola and Circle as Envelopes
Play C3 E3 G3 C4_C4
Introduction
Discover Resources
Concurrent lines
The Brocard Triangle and Brocard Circle
median
square construction
Equation of plane given a point and a line in the plane
Discover Topics
Angles
Diagrams
Quadrilaterals
Logic
Derivative