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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
兩組對邊相等的四邊形
第八周作业
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
VV圓
題6
vector addition and subtraction
Introduce tangent ratio
正方体内切球
Discover Topics
LCM and GCD
Terms
Vectors 3D (Three-Dimensional)
Median Value
Planes