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ie 5
Author:
LAM YU SANG
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
找出對稱軸
兩組對邊相等的四邊形
三位數除以一位數（二）
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黎曼和
GGB5---3D功能
扣球路徑求直線方程式
優良作品2
畢氏
三次函數
Discover Topics
Fractions
Equations
Optimization Problems
Statistical Characteristics
Set Theory