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Author:
蘇梓棱
GeoGebra
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空间中两直线的位置关系
垂直線的斜率
祖冲之的期望：内棋与外棋
兩位數除以一位數（一）
直線的斜率
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線對稱圖形練習2
等弧對等角
五上複合圖形的面積
旋轉長方形
基础知识
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Means
Secant Line or Secant
Differential Equation
Probability
Upper and Lower Sum or Riemann Sum