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菱形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79847
GeoGebra
New Resources
算柱 (兩位數)
直角坐標平面上的旋轉變換
畫出對稱圖形
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
Discover Resources
以剪貼比較圖形大小
商高定理3
多邊形上的自由動點
中點軌跡(動點在兩圓上)
lower sum for x^2
Discover Topics
Rotation
Fractal Geometry
Integers
Scalene Triangles
Incircle or Inscribed Circle