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GeoGebra
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兩位數加法
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
畫出對稱圖形
找出對稱軸
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證平行四邊形 (對邊相等)
proof92吳冠穎
n星角
鉛筆畫圓
翰林數學_2下_CH4-1_平行線的特性與定義
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Differential Equation
Volume
Parabola
Incircle or Inscribed Circle
Geometry