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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
English version:
http://ggbtu.be/m79826
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數加法
球體建築師
GeoGebra笔记功能体验课件
三位數除以一位數（一）
Discover Resources
複雜的解法
ex 9
圓錐截痕
負指數的計算
面積比化為向量比
Discover Topics
Distributions
Triangles
Logic
Diagrams
Pie Chart or Circle Chart