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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）
柱體建築師
畫出對稱圖形
直角坐標平面上的旋轉變換
Discover Resources
角平分線
反演的應用：鞋匠的小刀
Lituus
gmy106a10 限制範圍的三角形面積
線性規劃
Discover Topics
Power Functions
Random Variables
Division
Tree Diagrams
Curve Sketching