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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
柱體建築師
算柱 (兩位數)
找出對稱軸
球體建築師
第八周作业
Discover Resources
技巧集
x^4 vs. x^2
三角形的三角和及外心、內心圓
kkklkl
相反数 探究 （教材第9页）
Discover Topics
Normal Distribution
Sequences and Series
Quadratic Equations
Arithmetic Mean
Trigonometric Functions