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圓外切四邊形對邊和等長
Author:
謝易達
GeoGebra
New Resources
【案例】2013年安徽高考15题
拼砌四邊形
三位數除以一位數（一）
異分母分數減法
球體建築師
Discover Resources
雙曲線20160521
Elliptic Curve
circle
旋轉橢圓
sin(x) 的函數圖形的副本
Discover Topics
Constructions
Derivative
Ellipse
Sphere
Polygons