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Author:
nojh
GeoGebra
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撒针估算面积实验
活动三:应用性质
GeoGebra数学资源(4-8年级)
椭圆内切圆链
比較五件物件的重量
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Classification of Triangles 三角形的分類
HKCEE 2009 Q17
好多好多正方形
Copy of 幾何分布 (Geometric Distribution)
俄罗斯方块(第二版)
Discover Topics
Quadratic Equations
Right Triangles
Means
Quadrilaterals
Cone