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Author:
风亦飞
GeoGebra
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四邊形的特性
拼砌四邊形
找出對稱軸
球体的体积推导（优化版）
判斷球體
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封閉著色2
二維點陣列變化
Net of pyramid
比例中的定值問題
翰林數學_2下_CH3-1_三角形的外角定理
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Perimeter
Tangent Line or Tangent
Mathematics
Complex Numbers
Histogram