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椭圆的定义
Author:
GeoGebra Institute of WuXi
GeoGebra
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近似值：有效數字
球體建築師
找出對稱軸
兩位數除以一位數（一）
算柱 (兩位數)
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Activity 3
旋轉三角形
了解如何使用 GeoGebra 资源
多邊形的切割與拼砌的副本
S0G4L2 到两点距离的运算为定值
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Triangles
Division
Rectangle
Prism
Fractions