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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
直角坐標平面上的旋轉變換
拼砌四邊形
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
Discover Resources
過圓內一點最短弦
color
鋪地磚(六邊形)
扇形面積公式3
tool1
Discover Topics
Stochastic Process or Random Process
Indefinite Integral
Optimization Problems
Area
Rectangle