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Author:
张书真
GeoGebra
New Resources
双心四边形
异形操场
正方形雪花图案
常见四边形是否是双心四边形
斐波那契螺旋弧线(表格法-可动态调节)
Discover Resources
trigo ratios np2c
大字體
Introduce tangent ratio
maze-temp
三角形分類
Discover Topics
Functions
Centroid or Barycenter
Circle
Straight Lines
Prism