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圓外切四邊形（展示可推廣到凹多邊形）
Author:
Gideon Huang
Topic:
Geometry
GeoGebra
New Resources
画直线等分三角形的面积
圓的切線方程
平行線的斜率
【案例】2018年全国1卷理科12题
圓周公式的應用
Discover Resources
數值滑桿
正五角柱(可旋轉)
圖形2
用面積逼近圓周率的副本
用向量找北极星
Discover Topics
Natural Numbers
Random Variables
Stochastic Process or Random Process
Prism
Logarithmic Functions