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祖冲之的期望：内棋与外棋
Author:
孟宝兴
GeoGebra
New Resources
畫出對稱圖形
四邉形 (四年級) 教師版
算柱 (兩位數)
找出對稱軸
直角坐標平面上的旋轉變換
Discover Resources
錯覺藝術
分數與小數
Copy of 蔡01
Copy of 固定周界的長方形的面積變化
雙曲線3-等軸法
Discover Topics
Sequences and Series
Pyramid
Optimization Problems
Special Points
Differential Equation