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重疊長方形的周界
Author:
Anthony Or 柯志明
Topic:
Perimeter
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等的四邊形
異分母分數減法
錐體建築師
兩位數除以一位數（一）
Discover Resources
向量的分解（非垂直）
Measuring Volume 4
shuangquxian
閱讀量杯內的水位線
我的第一个GGB绘本
Discover Topics
Linear Equations
Similar Triangles
Rotation
Matrices
Difference and Slope