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一线三等角
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GeoGebra
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直線的斜率
科氏力 (Coriolis Force)
圓的切線方程
【案例】2013年安徽高考15题
垂直線的斜率
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全等三角形
Statistics (M1)
三角形數
實作作業2
試算表畫纏繞畫
Discover Topics
Rotation
Inequalities
Sphere
Symmetry
Fractions