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Author:
chen mingchuan
GeoGebra
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四邉形 (四年級) 教師版
畫出對稱圖形
找出對稱軸
兩組對邊相等的四邊形
拼砌四邊形
Discover Resources
Quiz on Polar Coordinates (2) 極坐標測驗2
電子幾何條（2014）
商高定理
試算表應用
題 2
Discover Topics
Linear Regression
Orthocenter
Circumcircle or Circumscribed Circle
Rectangle
Rotation