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割圆术估计圆周率（刘徽）
Author:
陈力
Topic:
Algebra
,
Calculus
,
Circle
,
Circumcircle or Circumscribed Circle
,
Limits
,
Polygons
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
兩位數除以一位數（一）
第八周作业
兩位數加法
Discover Resources
判斷球體 2
國徽
動態幾何錯覺
Solving the equations in the form ax + b = cx + d (Grouping like terms)
平行四边形变形
Discover Topics
Bar Chart or Bar Graph
Parabola
Upper and Lower Sum or Riemann Sum
Straight Lines
Random Variables