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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
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
直角坐標平面上的旋轉變換
【案例】圆柱体内放置一个大球六个小球
判斷球體
Discover Resources
conjugate
七巧板
彩色包絡球
小四平面圖形學習單
纏繞畫
Discover Topics
Vectors 3D (Three-Dimensional)
Statistical Characteristics
Stochastic Process or Random Process
Polygons
Arithmetic Mean