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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
GeoGebra笔记功能体验课件
畫出對稱圖形
算柱 (兩位數)
兩組對邊相等的四邊形
三位數除以一位數（二）
Discover Resources
总5第五题
極線對偶定理 / polar duality theorem
容積盒子(加蓋)
彩色包絡球
圆之吻（Apollonius circles）
Discover Topics
Correlation
Tangent Line or Tangent
Constructions
Trapezoid
Geometry