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Author:
Jianqiang He
GeoGebra
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三位數除以一位數（一）
兩組對邊相等的四邊形
找出對稱軸
異分母分數減法
兩位數除以一位數（二）
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溫室設計圖
GeoGebra培训手册素材
面積
內心
多边形外角和的副本
Discover Topics
Prism
Secant Line or Secant
Perimeter
Equilateral Triangles
Similarity Transformation or Similarity