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圆在多边形上滚动
Author:
GeoGebra Institute of WuXi
GeoGebra
New Resources
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
錐體建築師
判斷球體
Discover Resources
複數等比級數 (4.4)
數字的加減數線表示
熱帶魚 (顏色變更)楊靜宜
Copy of 均分除法（分數÷整數）
作業一
Discover Topics
Sequences and Series
Differential Equation
Boxplot
Vectors
Similar Triangles