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[教学] 欧拉线与三角形的心6:内心与距离
Author:
acchu
GeoGebra
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平行線的判定
盈利與虧蝕
科氏力 (Coriolis Force)
撒针估算面积实验
异形操场
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waaachen
呼拉圈
路徑四動畫
四点共圆
S1 Ex9.2 Q17
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General Quadrilateral
LCM and GCD
Arithmetic
Parametric Curves
Incircle or Inscribed Circle