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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
四邊形的特性
異分母分數減法
兩組對邊相等的四邊形
柱體建築師
球体的体积推导（优化版）
Discover Resources
龍騰4_1-1課例3
Parallelogram 02
九點共圓
Centroid
GeoGebra成像规律的演示
Discover Topics
Confidence Interval
Poisson Distribution
Matrices
Optimization Problems
Parabola