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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
sanjiaohanshu
兩組對邊相等和有直角的四邊形
四邊形的特性
第八周作业
球體建築師
Discover Resources
斜線圖的畫法
根據百分率找數量（一）:例1
barara magic stick
練習_對稱
橢圓1-同心圓法
Discover Topics
Binomial Distribution
Angles
Vectors 3D (Three-Dimensional)
Upper and Lower Sum or Riemann Sum
Median Line