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傅里叶级数 Fourier series
Author:
肖建伟
GeoGebra
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三位數除以一位數（一）
拼砌四邊形
畫出對稱圖形
兩組對邊相等的四邊形
兩位數除以一位數（二）
Discover Resources
From:PTT 國小題目求面積
Flips
角錐及展開圖
串珠(兩種顏色)
拋物線1 焦點法
Discover Topics
Prism
Sine
Special Points
Random Experiments
Normal Distribution