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圓外切及內切
Author:
luke huang
GeoGebra
New Resources
找出對稱軸
三位數除以一位數（一）
兩位數除以一位數（一）
柱體建築師
画直线等分三角形的面积
Discover Resources
I am superman
Division Algorithm 除法算法
折一半
Similar triangles reasons
直角三角形斜邊上的高
Discover Topics
Prism
Interest Calculation
Difference and Slope
Vectors
Trapezium