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同心圓
Author:
柳淳珈
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
四邊形的特性
錐體建築師
畫出對稱圖形
Discover Resources
分數的加法
草枝襬 敢羚羊
正立方體內皂膜
正十二面體內接正四面體旋轉
圓周角與圓心角之度數關係臆測（圓周角的一邊通過圓心）
Discover Topics
Reflection
Upper and Lower Sum or Riemann Sum
Perimeter
Equilateral Triangles
Cube