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GeoGebra
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折扣
双心四边形
活动三:应用性质
异形操场
百分數及其應用
Discover Resources
IMO2014C
橢圓的定義
transformation_reflection
旋转的线段组成面
圆锥曲线
Discover Topics
Division
Rectangle
Geometric Distribution
Fractions
Geometric Transformations