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同位角---不平行綫
Author:
chanfushun
GeoGebra
New Resources
第八周作业3
斐波那契螺旋弧线（表格法）
平行線的判定
盈利與虧蝕
撒针估算面积实验
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圓與弦2
n star
判斷線型函數y=f(x)=ax+b的b值(隨機出題)
橢圓的定義畫圖
高美溼地
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Mode
General Quadrilateral
Correlation
Inequalities
Parabola