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Author:
xuhao
GeoGebra
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判斷球體
拼砌四邊形
四邉形 (四年級) 教師版
兩位數除以一位數（一）
球体的体积推导（优化版）
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絕對值距離和
Sequence指令練習(逐一套疊三角形)
柱體＿
數學繪圖
任意四边形各边中点的连线必构成平行四边形.许兴华数学
Discover Topics
Median Value
Symmetry
Solids or 3D Shapes
Curve Sketching
Incircle or Inscribed Circle