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2012

Author:Alvinwo

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兩組對邊相等的四邊形
四邊形的特性
畫出對稱圖形
兩位數除以一位數（一）
画直线等分三角形的面积

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凸透鏡成像
三角形的外心
端點在兩圓周線段中點軌跡
雙曲線2-焦點法
旋轉正方形

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Statistics
Real Numbers
Difference and Slope
Cuboid
Congruence

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