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猜猜平均數（限時版）
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
判斷球體
近似值：有效數字
sanjiaohanshu
拼砌四邊形
直角坐標平面上的旋轉變換
Discover Resources
hiughgggfgfhfhdiegfgbagdefhjkghdf
二次函数最值问题
線性組合1：正六邊形
拋物線1--焦點法
sin(x) 的函數圖形 的複本
Discover Topics
Mathematics
Volume
Median Line
Step Functions
Arithmetic