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Author:
Chan Yip-Cheung
GeoGebra
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異分母分數減法
画直线等分三角形的面积
【案例】2013年安徽高考15题
兩位數加法
判斷球體
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三角形的外心
畢氏定理學生(林辰洋)
滑桿動晝
橢圓3-平行四邊形法
S3 WS4.3 Q02(3D圖)
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Equilateral Triangles
Centroid or Barycenter
Tangent Line or Tangent
Rhombus
Vectors 3D (Three-Dimensional)