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Author:
tan90
GeoGebra
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美國國旗 (Codex 版)
拼砌四邊形
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
找出對稱軸
Discover Resources
求 a + b 的最大值?
三角函數
Animation of Refraction
地球儀
GGB 教程
Discover Topics
Congruence
Rotation
Scatter Plot
Straight Lines
Geometry