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兩組對邊相等的四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
兩位數除以一位數（二）

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工作紙題2
畢氏定理平移版
滑桿動畫示範-1
angle between 2 planes 01
活动三：应用性质

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Algebra
Parallelogram
Tangent Line or Tangent
Median Value
Linear Equations

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