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長方形
Author:
Yip Chi Wai
GeoGebra
New Resources
畫出對稱圖形
三位數除以一位數（二）
異分母分數減法
四邉形 (四年級) 教師版
拼砌四邊形
Discover Resources
正方體的旋轉對稱
三棱柱的表面面積
(008)80102
孔明棋
Copy of 正方体展开图
Discover Topics
Curve Sketching
Sine
Isosceles Triangles
Variance
Ellipse