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圆的展开与计算
Author:
九章算术
GeoGebra
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球體建築師
錐體建築師
兩位數除以一位數（一）
畫出對稱圖形
直角坐標平面上的旋轉變換
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專題
畢氏定理完成20170330
等距曲线ggb作图法
翰林數學_2下_CH3-2_SSA
对多边形对角线、内角和、外角和的理解
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Addition
Calculus
Intersection
Histogram
Ellipse