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正N边形在圆内的滚动
Author:
孟宝兴
GeoGebra
New Resources
近似值：有效數字
Nested spiral octagon
Earth with coastline
小数 的副本
湖南省张毅郴数字教研工作室 logo
Discover Resources
Length of Horizontal or Vertical Line Segments 水平或鉛垂線段的長度
三角形三邊上各一點最小周長
包絡線
有多少正方体
圆的平移（平移加滑桿）
Discover Topics
Rotation
Statistical Characteristics
Unit Circle
Mode
General Quadrilateral