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Author:
johnmayhk
GeoGebra
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兩位數加法
異分母分數減法
球体的体积推导
四邊形的特性
球体的体积推导（优化版）
Discover Resources
Mobius 變換
甚麼是球體
四角錐的坡度
圓_Collection
正方體組合
Discover Topics
Interest Calculation
Poisson Distribution
Median Line
Real Numbers
Scatter Plot