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Author:
Chenwei Chen
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
判斷球體
錐體建築師
四邊形的特性
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np2c
Copy of 閱讀鐘面及數字鐘(時和分)
四邊形內多個四邊型旋轉
Copy of 七巧板
雙心運動
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Area
Median Value
Calculus
Perimeter
Curve Sketching