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探究平行四邊形的特性
Author:
Ng KC
GeoGebra
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錐體建築師
球體建築師
GeoGebra笔记功能体验课件
找出對稱軸
兩位數除以一位數（一）
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平行四邊形有甚麼特性？
斜率
梯形面積(求上底)
尝试绘本
翰林數學_2下_CH3-1_三角形的外角和
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Multiplication
Centroid or Barycenter
Angles
Equilateral Triangles
Dilation