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Author:
黑幽灵
识货
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兩組對邊相等和有直角的四邊形
判斷球體
拼砌四邊形
直角坐標平面上的旋轉變換
找出對稱軸
Discover Resources
繪圖練習
旋轉
GeoGeBra畫橢圓形的動態軌跡
作業
单位圆与正弦函数
Discover Topics
Special Points
Similarity Transformation or Similarity
Upper and Lower Sum or Riemann Sum
General Quadrilateral
Inequalities