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同心圓
Author:
許清惟
GeoGebra
New Resources
兩位數除以一位數（二）
找出對稱軸
球體建築師
四邉形 (四年級) 教師版
畫出對稱圖形
Discover Resources
判斷柱體11
國小數與量
軌跡觀察---兩圓上線段中點
同餘
線的面化
Discover Topics
Natural Numbers
Inequalities
Special Points
Vectors
Parametric Curves