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三角函数
Author:
zjulxj
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
異分母分數減法
三位數除以一位數（二）
兩位數加法
Discover Resources
機率統計
Introduce Tangent Ratio
三年級除法(二)：一位數除兩位數
拋物線5--包絡線法
Copy of 三角形的面積
Discover Topics
Vectors 3D (Three-Dimensional)
Scatter Plot
Secant Line or Secant
Hyperbola
Boxplot