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凹正方形
Author:
王玉霞
GeoGebra
New Resources
找出對稱軸
柱體建築師
拼砌四邊形
三位數除以一位數（二）
兩位數除以一位數（二）
Discover Resources
VV圓
四下_面積（一）(學生版)
arithmetic operation
氯化鈉晶體
常见立体图形的截面
Discover Topics
Scatter Plot
Expected Value
Cosine
Poisson Distribution
Rhombus