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菱形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79847
GeoGebra
New Resources
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
兩位數加法
GeoGebra笔记功能体验课件
第八周作业
Discover Resources
坐標幾何（中一）
Drawing quadrilaterals on the grid or the pinboard
gct-a01-jc091v1-27 三角形旋轉
三角形三內角和為 180°
軌跡
Discover Topics
Cube
Parabola
Conic Sections
Addition
Differential Equation