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Author:
chen mingchuan
GeoGebra
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算柱 (兩位數)
畫出對稱圖形
異分母分數減法
兩位數加法
錐體建築師
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橢圓軌跡(兩同心圓)102.12.04
t6 geobra
切割任意四邊形再拼砌成矩形
封閉圖
Gazing Cow Problem (d)
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Trigonometric Functions
Sine
Tangent Function
Intersection
Standard Deviation