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动点问题（线段最小值）
Author:
杨桃李@
GeoGebra
New Resources
龙形曲线-分形龙
折扣
圓的基本性質
双心四边形
撒针估算面积实验
Discover Resources
基本圖形面積
優良作品3
Tool4P
拋物線四-平行四邊形法
正多边形内接迭代的副本
Discover Topics
Upper and Lower Sum or Riemann Sum
Planes
Calculus
Limits
Percentages