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正十七邊形
Author:
vinnyya
GeoGebra
New Resources
平行線的判定
第八周作业1
撒针估算面积实验
龙形曲线-分形龙2
双心四边形
Discover Resources
分水問題
拋物線的兩切線
动点
等腰三角形
关于椭圆的一个性质
Discover Topics
Trapezoid
Centroid or Barycenter
Trigonometry
Special Points
Incircle or Inscribed Circle