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第1章知识结构框图
Author:
GeoGebra Institute of WuXi
GeoGebra
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近似值：有效數字
柱體建築師
兩位數加法
算柱 (兩位數)
直角坐標平面上的旋轉變換
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Difference of Two Squares 平方差 (2)
冪函數
DSE Circle-ACT02B Angle at centre and circumference
對稱成分(零序.正序.負序)
相反数 思考（教材第10页）
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Derivative
Cone
Optimization Problems
Centroid or Barycenter
Subtraction