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梯形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79855
GeoGebra
New Resources
【案例】2013年安徽高考15题
錐體建築師
第八周作业
拼砌四邊形
兩組對邊相等的四邊形
Discover Resources
三垂線
Introduction to Trigonometry from a Unit Circle
扇形動畫
GGB11
拋物線3-平行四邊形法
Discover Topics
Dilation
Cone
Geometric Transformations
Mode
Stochastic Process or Random Process