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Author:
Ng Cheuk Hei
GeoGebra
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畫出對稱圖形
四邉形 (四年級) 教師版
判斷球體
三位數除以一位數（二）
異分母分數減法
Discover Resources
畫三角形 題2d
Graph of Cosine Function 餘弦方程圖像
Geometry : Types of Angles (幾何：角的種類)
函數平移
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Trapezoid
Logarithmic Functions
Scalene Triangles
Rectangle
Ellipse