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Author:
Ricky Chan
GeoGebra
New Resources
判斷球體
兩位數除以一位數（二）
拼砌四邊形
找出對稱軸
直角坐標平面上的旋轉變換
Discover Resources
Bearings
y=Sin(x)伸縮平移
基础知识
钟表制作成功啦
旋转的台阶
Discover Topics
Percentages
Tree Diagrams
Upper and Lower Sum or Riemann Sum
Dilation
Hypothesis Testing