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GeoGebra
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GeoGebra
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平行線的斜率
撒针估算面积实验
探究三角形的全等條件
垂直線的斜率
第八周作业3
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數學作圖
task4
鉛筆的長度
圖示初小乘數
國旗
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Volume
Means
Special Points
Circumcircle or Circumscribed Circle
Trapezoid