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gdss
Author:
Ng Cheuk Hei
GeoGebra
New Resources
四邉形 (四年級) 教師版
找出對稱軸
画直线等分三角形的面积
三位數除以一位數（一）
畫出對稱圖形
Discover Resources
邊長與三角形（一）
isosceles triangle construction
救生員的職責
No.2
質數
Discover Topics
Special Points
Pie Chart or Circle Chart
Hyperbola
Power Functions
Hypothesis Testing