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過點切圓的動圓圓心軌跡
Author:
Wu Xiao-Ren
GeoGebra
New Resources
兩位數除以一位數（一）
異分母分數減法
畫出對稱圖形
判斷球體
【案例】2018年全国1卷理科12题
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Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
簡單動畫
圓心角
平行四邊形堆垛
Copy of 畢氏樹
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Cube
Tangent Line or Tangent
Arithmetic Operations
Angles
Mode