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挑戰題2：兩重疊正方形面積
Author:
Erix Chen
GeoGebra
New Resources
GeoGebra笔记功能体验课件
找出對稱軸
球体的体积推导（优化版）
三位數除以一位數（一）
拼砌四邊形
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waaachen
相似形
雙重積分：Double Integral
圓與切線
讀磅
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Rational Numbers
Unit Circle
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Plane Figures or Shapes
Histogram