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椭圆的定义

Author:guomenglin

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兩位數除以一位數（二）
兩組對邊相等的四邊形
拼砌四邊形
找出對稱軸
錐體建築師

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指數與對數
Parallelogram 02 - testing
向量的伸縮
線性規劃
公切線的引入
少了一個質數One less prime number

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Geometry
Trapezoid
Upper and Lower Sum or Riemann Sum
Solids or 3D Shapes
LCM and GCD

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