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Martin Ressaar
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martin.ressaar
GeoGebra
New Resources
Parallelograms: Quick Investigation
Exploring Simple Loci 探究簡單軌跡
Construct a Conic
alg2_05_05_01_applet_exp_flvs
alg2_05_05_01_applet_exp_2_flvs
Discover Resources
forum
Diffgl
Distance in the Coordinate Plane
derivative
Mini Project 2