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rotation of Simson's line
Author:
nujiznaw
GeoGebra
New Resources
科赫雪花
盈利與虧蝕
直線的斜率：水平變化 & 鉛垂變化
第八周作业
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
Compare areas by cutting shapes Q1
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
椭圆两个焦点与椭圆上点的连线
欧拉线
sin(x) 的函數圖形 的複本
Discover Topics
Pythagoras or Pythagorean Theorem
Subtraction
Complex Numbers
LCM and GCD
Right Triangles