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Author:
Alex Leong
GeoGebra
New Resources
判斷球體
四邊形的特性
兩位數加法
錐體建築師
兩位數除以一位數（二）
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三角形重心軌跡
坐标变换
S1 Ex9.2 Q17
構作放大圖形
折扣 例3的副本
Discover Topics
Rational Numbers
Ratios
Multiplication
Real Numbers
Pythagoras or Pythagorean Theorem