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Proof2 周子翔
Author:
郭亮偉
GeoGebra
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兩位數除以一位數（一）
拼砌四邊形
【案例】2018年全国1卷理科12题
兩位數加法
近似值：有效數字
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測試 ...
複合不平等
reflectional symmetry_2
Angle Between a Line and a Plane Definition 線與平面的交角 定義
三角形內角和為180度
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Scatter Plot
Linear Functions
Pyramid
Centroid or Barycenter
Surface