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潘洛斯階梯
Author:
張怡雯
GeoGebra
New Resources
折扣
椭圆内切圆链
第八周作业
正方形雪花图案
科赫雪花
Discover Resources
Problem1:(md+me+mf)/(ad+be+cf)=a
三角形的五心
六边形的向外迭代
椭圆的离心率
元旦快乐(制作:孟宝兴)
Discover Topics
Upper and Lower Sum or Riemann Sum
Cone
Polygons
Sphere
Perimeter