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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
第八周作业
兩位數加法
三位數除以一位數（一）
異分母分數減法
柱體建築師
Discover Resources
賴桑_等差數列與級數_兩數列之比例
My second work
Ex5C#5
與兩圓相切之圓心雙曲線軌跡
我的第一个GGB绘本
Discover Topics
Planes
Quadratic Equations
Parametric Curves
Integral Calculus
Vectors