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椭圆的离心率
Author:
孟宝兴
GeoGebra
New Resources
三位數除以一位數（一）
判斷球體
柱體建築師
兩組對邊相等和有直角的四邊形
找出對稱軸
Discover Resources
二次函數圖形的描繪
有趣的反例
圓錐曲線
纏繞畫1
Copy of 方格紙上畫平行四邊形3
Discover Topics
Orthocenter
Expected Value
Area
Random Variables
Angles