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包絡橢圓
Author:
Wu Xiao-Ren
Topic:
Ellipse
操作說明:
1. 拖曳A點,則切線s可以包絡出橢圓(所有切點的軌跡).
GeoGebra
New Resources
找出對稱軸
畫出對稱圖形
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
球体的体积推导(优化版)
Discover Resources
拋物線與直線相交弓形區域
固定軌跡問題
circle
EARTH01
三方圓三視圖
Discover Topics
Equations
Angles
Straight Lines
Tree Diagrams
Centroid or Barycenter