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19.1-2 椭圆的标准方程和性质
Author:
GeoGebra Institute of WuXi
GeoGebra
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垂直線的斜率
圓周公式的應用
直線的斜率
兩位數除以一位數（一）
平行線的斜率
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Area of Triangle_1
角速度概念
菱形
體積
立體圖
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Cylinder
Division
Stochastic Process or Random Process
Mathematics
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