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Author:
oldestman1
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
撒针估算面积实验
平行線的斜率
常见四边形是否是双心四边形
双心四边形
Discover Resources
Apollonius Problem 7 CCP power inversion 12
心型線
ggb 優良作品 _10
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從平均數找出數列中的其中一項數值(答案是小數)
Discover Topics
Matrices
Rational Numbers
Random Experiments
Plane Figures or Shapes
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