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定周长的正多边形面积变化规律（含圆）
Author:
张英华
Topic:
Area
GeoGebra
New Resources
拼砌四邊形
柱體建築師
兩位數加法
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
Discover Resources
clock
正四面體
貝氏曲面
固定周界的矩形
扇形旋轉
Discover Topics
Coordinates
Centroid or Barycenter
Square
Terms
Differential Equation