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three circle touching each other
Author:
Huang
three circle touching each other
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
錐體建築師
四邊形的特性
Discover Resources
平行四邊形的面積
正n星角
正十二面體
習題二
圆周展开
Discover Topics
Piecewise Functions
Logarithm
Differential Calculus
Differential Equation
Set Theory