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勾股定理的毕氏证明
Author:
数豆豆
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
龙形曲线-分形龙
折扣
活动三：应用性质
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四点共圆
幸運輪
圓錐截面曲線
分数整体与部分为单位1的线段图示
指数函数的副本
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Volume
Ellipse
General Quadrilateral
Complex Numbers
Differential Calculus