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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
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
拼砌四邊形
【案例】2013年安徽高考15题
錐體建築師
Discover Resources
任務2
Quiz on Reflection 反射變換：測驗
應用圓周率: 題3
GGB8
圆的面积展开的副本
Discover Topics
Curve Sketching
Rhombus
Tangent Line or Tangent
Sphere
Arithmetic Operations