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最小周長
Author:
張丰耘
GeoGebra
New Resources
柱體建築師
画直线等分三角形的面积
錐體建築師
三位數除以一位數（二）
兩位數加法
Discover Resources
以剪貼比較圖形大小 題2
講義P80 剪出現對稱圖形.ggb
題2
Orthocentre
四年級除法
Discover Topics
Linear Programming or Linear Optimization
Right Triangles
Line Segment
Probability
Scalene Triangles