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焦点弦2
Author:
liu
GeoGebra
New Resources
异形操场
斐波那契螺旋弧线（表格法-可动态调节）
比較五件物件的重量
龙形曲线-分形龙
双心四边形
Discover Resources
圓的面積
waaachen
優良作品1(沛綺)
三宅一生132 5
六年級 圓周
Discover Topics
Upper and Lower Sum or Riemann Sum
Division
Incircle or Inscribed Circle
Constructions
Arithmetic