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Wave Interference
Author:
Alex CHIK
GeoGebra
New Resources
錐體建築師
畫出對稱圖形
三位數除以一位數（一）
算柱 (兩位數)
球體建築師
Discover Resources
圖二
圓周 (圖形A)
動畫的根本animation of root
Question 2
达芬奇椭圆仪
Discover Topics
Median Value
Hypothesis Testing
Polygons
Geometric Transformations
Algebra