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画正弦
Author:
李玲玲
GeoGebra
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折扣
百分數及其應用
椭圆内切圆链
斐波那契螺旋弧线(表格法)
撒针估算面积实验
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正方體內的三角錐
以剪貼比較圖形大小 題2
題五
蝴蝶定理
折扣 例4的副本
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Histogram
Random Variables
Mathematics
Arithmetic Mean
Centroid or Barycenter