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GeoGebra
GeoGebra Classroom
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谢鹏
GeoGebra
New Resources
龙形曲线-分形龙
双心四边形
撒针估算面积实验
垂直線的斜率
斜率的值
Discover Resources
近似值：小數位及有效數字
Properties of a Parallelogram
圓形單獨滑動
Directed numbers
三角形與六邊形的結合