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19.4-2 抛物线的标准方程和性质
Author:
GeoGebra Institute of WuXi
GeoGebra
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垂直線的斜率
直線的斜率
異分母分數減法
平行線的斜率
三位數除以一位數（一）
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生活中的平面圖形關係─平分
阿波羅圓
Geometry: Angles Sum of Triangle (幾何：三角形內角和)
圓周公式應用題2
四邊形ADFE的面積是多少？
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Function Graph
Root
Differential Calculus
Circumcircle or Circumscribed Circle
Step Functions