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旋轉正方形
Author:
33陳郁婷
GeoGebra
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找出對稱軸
拼砌四邊形
三位數除以一位數（一）
GeoGebra笔记功能体验课件
近似值：有效數字
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正方體內的三角錐
三角函數的性質
perimeter of rectangle
cos(α) + cos(β) + cos(γ) 的對稱性
瓜豆原理——动点跟随
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Coordinates
Polygons
Incircle or Inscribed Circle
Kite
Rhombus