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tool4
Author:
陳禹妗
GeoGebra
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祖冲之的期望:内棋与外棋
【案例】2018年全国1卷理科12题
多邊形的面積
【案例】2013年安徽高考15题
垂直線的斜率
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前景圖、背景圖
了解圓方程(1)
HKDSE 3D Figures
煞車
百分位數、四份位數和中位數
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Hyperbola
Addition
Conditional Probability
Arithmetic
Parametric Curves