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IMO2015D

Author:Terence

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兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩位數除以一位數（二）
畫出對稱圖形
判斷球體

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根據百分率找數量（二）: 例3
畢氏定理
畢氏定理證明
三角形探究1
Investigation on definite integral

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Incircle or Inscribed Circle
Matrices
Quadratic Equations
Perimeter
Rectangle

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