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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
Claude 解幾何題
Earth with coastline
找出對稱軸
小数 的副本
算柱 (兩位數)
Discover Resources
shihfeng的第一本Geogebra繪本
Sierpinski Carpet
較複雜的周界問題(一)
异面直线立方体
椭圆的中点弦的轨迹.许兴华数学
Discover Topics
Expected Value
Square
Constructions
Exponential Functions
Scatter Plot