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（一）圆
Author:
jiushu_public
,
玖玖
π——割圆术
GeoGebra
圆面积推导
GeoGebra
New Resources
活动三：应用性质
盈利與虧蝕
平行線的判定
三角函数 的副本
百分數及其應用
Discover Resources
Testing
磁磚著色
電子幾何條
讀磅
劉徽的「割圓術」的副本
Discover Topics
Rectangle
Surface
Trigonometric Functions
Secant Line or Secant
Poisson Distribution