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GeoGebra
九點圓
Author:
Wu Xiao-Ren
三角形的三中點，三垂足，三頂點到垂心中點共圓
New Resources
基础知识
椭圆的生成
线性规划
月球公轉軌跡及月相
勾股树
Discover Resources
Contour Lines 等高線
等軸雙曲線
circle
體積
Trigonometric Relations(90,270)
Discover Topics
Special Points
Algebra
Addition
Vectors 3D (Three-Dimensional)
Stochastic Process or Random Process
