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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
球體建築師
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
兩位數加法
錐體建築師
Discover Resources
trigo ratios np2c
長方體透視圖(三頂點組成三角形)
畢氏定理
圓與弦2的副本
公切線長度的計算的副本
Discover Topics
Upper and Lower Sum or Riemann Sum
Equilateral Triangles
Symmetry
Parabola
Similarity Transformation or Similarity