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ie 7
Author:
LAM YU SANG
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
球体的体积推导（优化版）
找出對稱軸
異分母分數減法
Discover Resources
Compound Inequalities
How to draw a triangle with ruler and compasses?
Locus (What's wrong)
Copy of 函數切線及法線
三視圖
Discover Topics
Vectors
Indefinite Integral
Quadratic Functions
Reflection
Statistical Characteristics