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旋轉4
Author:
Grace
GeoGebra
New Resources
判斷球體
兩位數除以一位數（二）
兩位數加法
畫出對稱圖形
找出對稱軸
Discover Resources
向量
Copy of 固定周界的長方形的面積變化
二元线性规划的图解法(习题5)
Copy of 方格紙上畫四邊形
两角和的正弦公式几何证明（改进）
Discover Topics
Arithmetic
Scalene Triangles
Planes
Tangent Function
Arithmetic Operations