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两位数减法学习
Author:
Fuxuxu
GeoGebra
New Resources
撒针估算面积实验
第八周作业3
双心四边形
龙形曲线-分形龙2
盈利與虧蝕
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直角坐标
三角形三內角和為 180°
指数函数与对数函数关于y=x对称
進出刀量測-圓形
圓錐曲線Conic Section
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Diagrams
Circle
Parametric Curves
Percentages
Trigonometric Functions