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Ex5D#4
Author:
Big Lee
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
三位數除以一位數（二）
四邊形的特性
GeoGebra笔记功能体验课件
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Volume_Section
凹面鏡成像
Sierpinski 分形
tan900
翰林數學_2下_CH3-1_三角形的外角和
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Area
Centroid or Barycenter
Translation
Probability
Piecewise Functions