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Author:
Henry Leung
GeoGebra
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第八周作业3
第八周作业
第八周作业2
球体的截面
椭圆内切圆链
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初中九年级数学期中考试试题
十字立方體
香港的硬幣
算幾不等式
三角形周長
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Arithmetic Operations
Rectangle
Plane Figures or Shapes
Cube
Quadratic Functions