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net8 - AB+BC+EH+GH
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GeoGebra Institute of WuXi
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画直线等分三角形的面积
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
畫出對稱圖形
找出對稱軸
Discover Resources
畢氏定理
角α与-α的正弦函数关系
垂線作圖
特殊角三角函数值
曲面指令练习（柱球转化）
Discover Topics
Parabola
Sine
Matrices
Geometric Transformations
Logic