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三角形外心
Author:
Chang Hui Fang
GeoGebra
New Resources
平行線的判定
正方形雪花图案
斐波那契螺旋弧线(表格法)
球体的截面
斐波那契螺旋弧线(表格法-可动态调节)
Discover Resources
四連桿(可調)
Testing
纏繞畫
推移(x 方向)的副本
圆锥曲线的统一画法.许兴华数学
Discover Topics
Planes
Limits
Kite
Coordinates
Differential Calculus