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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
兩位數除以一位數（一）
球體建築師
兩位數除以一位數（二）
找出對稱軸
柱體建築師
Discover Resources
畢氏定理
垂直1
指對數函數交點_1
圆锥曲线折纸操作题（教材案例）
螺旋线
Discover Topics
LCM and GCD
Linear Equations
Congruence
Circumcircle or Circumscribed Circle
Special Points