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生活中的平面圖形關係─線對稱
Author:
Galen_1
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球體建築師
直角坐標平面上的旋轉變換
画直线等分三角形的面积
兩位數除以一位數（一）
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判斷錐體 3
時鐘與數學
外積分配律
quiz 9.1 2(d)
Quiz on Addition and Subtraction of Directed Numbers (1)
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Fractions
Circumcircle or Circumscribed Circle
Coordinates
Conic Sections
Area