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Author:
Tong Wing Hong
GeoGebra
New Resources
常见四边形是否是双心四边形
双心四边形
斐波那契螺旋弧线（表格法-可动态调节）
撒针估算面积实验
第八周作业2
Discover Resources
雙曲線尺規作圖01
Tractrix surface
畢氏定理拼圖
放缩尺
含参的分段函数的单调性问题
Discover Topics
Hyperbola
Triangles
Circumcircle or Circumscribed Circle
Centroid or Barycenter
Pyramid