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勾股定理的证明:弦图面积平移法 的副本
Author:
刘护灵
GeoGebra
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龙形曲线-分形龙2
科赫雪花
异形操场
斐波那契螺旋弧线(表格法)
双心四边形
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happy birthday
固定周界的長方形面積變化
圓外角測試
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
整式乘法-平方差公式
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LCM and GCD
Calculus
Area
Similar Triangles
Addition