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三圓外切
Author:
AlexWang
GeoGebra
New Resources
球体的体积推导
画直线等分三角形的面积
三位數除以一位數（二）
拼砌四邊形
錐體建築師
Discover Resources
y=a(x-h)²+k
鏡射矩陣
barara magic stick
正多面體
海螺
Discover Topics
Parallelogram
Vectors 2D (Two-Dimensional)
Square
Coordinates
Isosceles Triangles