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三角形三內角和為 180°
Author:
louie lee
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
找出對稱軸
兩位數加法
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點到直線距離4：同心圓擴大
畢氏定理平移版
拼出三角形的副本
乘法训练
柱體建築師
Discover Topics
Random Experiments
General Quadrilateral
Plane Figures or Shapes
Geometric Mean
Parametric Curves