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Rotational Symmetry的副本
Author:
高锦婷
,
user3390
testing
GeoGebra
New Resources
拼砌四邊形
異分母分數減法
三位數除以一位數（一）
球體建築師
畫出對稱圖形
Discover Resources
正方形
圖F
Frequency Change
Copy of 七巧板
翹翹板
Discover Topics
Prism
Natural Numbers
Median Line
Mathematics
Centroid or Barycenter