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椭圆的离心率
Author:
孟宝兴
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
第八周作业
兩組對邊相等的四邊形
畫出對稱圖形
Discover Resources
[問題] 橢圓與雙曲線有共同焦點
兩點距離
交錯弓形的圓周角
指數的對稱
椭圆第一定义
Discover Topics
Incircle or Inscribed Circle
Volume
Prism
Optimization Problems
Power Functions