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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
畫出對稱圖形
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
四邉形 (四年級) 教師版
算柱 (兩位數)
Discover Resources
f(x) and f(-x)
九點共圓
例题1
捷徑問題
滑桿動畫示範-1
Discover Topics
Trigonometric Functions
Line Segment
Random Experiments
Confidence Interval
Standard Deviation