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Author:
许业成
GeoGebra
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兩位數除以一位數（二）
GeoGebra笔记功能体验课件
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
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Graph Paper
兩線段和圓的關係2
P4菱形定義
blue
圆的有关概念
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Trigonometry
Reflection
Ratios
Vectors 2D (Two-Dimensional)
Similarity Transformation or Similarity