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複數：正方形內的正方形
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
判斷球體
直角坐標平面上的旋轉變換
找出對稱軸
Discover Resources
東興那題的圖
交點的極限
圓周 (圖形A)
學習單：平行四邊形面積
Elliptic Curve