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Author:
cktsang
permutation (chi. ver.)
GeoGebra
New Resources
球體建築師
錐體建築師
兩組對邊相等的四邊形
畫出對稱圖形
兩位數除以一位數（一）
Discover Resources
waaachen
了解圓方程(0)
square and circle
与椭圆焦点三角形外角平分线有关的轨迹.许兴华数学
GeoGebra游戏案例集
Discover Topics
Set Theory
Real Numbers
Square
Intersection
Parametric Curves