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內切圓

Author:楊明德

Topic:Incircle or Inscribed Circle

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拼砌四邊形
【案例】2013年安徽高考15题
三位數除以一位數（二）
球体的体积推导（优化版）
畫出對稱圖形

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龍騰4_1-1講段7
優良作品3(昀潔)
电子表格建点
Angle between Lateral Faces 3
學習活動二之三解的圖形

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Subtraction
Addition
Cube
Geometric Distribution
Differential Equation

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