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凹正方形
Author:
王玉霞
GeoGebra
New Resources
兩位數加法
柱體建築師
拼砌四邊形
四邉形 (四年級) 教師版
三位數除以一位數（一）
Discover Resources
標準差：測驗
雜類(Miscellaneous)
Is this a prism 3
Copy of Area of square
平行線法
正弦曲线的生成
Discover Topics
Geometric Transformations
Function Graph
Line Segment
Dilation
Circle