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前測 12/4
Author:
Keung
GeoGebra
New Resources
球體建築師
找出對稱軸
Earth with coastline
sanjiaohanshu
四邊形的特性
Discover Resources
refraction law
费马点
三角測量
向量的伸縮
三位數除以一位數（二）
Discover Topics
Triangles
Reflection
Division
LCM and GCD
Percentages