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Circumference 圓周
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
三位數除以一位數（一）
畫出對稱圖形
兩位數除以一位數（二）
找出對稱軸
球體建築師
Discover Resources
行星運動
纏繞
ghseh 二次函數描點法上下平移-6
電流急急棒棒
靜態幾何錯視圖
Discover Topics
Prism
Parametric Curves
LCM and GCD
Logic
Trigonometry