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Properties of Special Quadrilaterals(1) 特殊四邊形的性質(1)
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
直角坐標平面上的旋轉變換
GeoGebra笔记功能体验课件
錐體建築師
柱體建築師
兩位數除以一位數（一）
Discover Resources
極值對稱於反曲點
Geometry: Plane Figures (幾何： 平面圖像)
二次函數
表面積
镂空正方体案例对比
Discover Topics
Step Functions
Translation
Vectors 2D (Two-Dimensional)
Numbers
Pie Chart or Circle Chart