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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
異分母分數減法
sanjiaohanshu
畫出對稱圖形
拼砌四邊形
三位數除以一位數（一）
Discover Resources
sin(x) 的函數圖形
以剪貼比較圖形大小 題1
對稱成分(零序.正序.負序)
N-ellipse
平移中心
Discover Topics
Addition
Matrices
Isosceles Triangles
Cylinder
Solids or 3D Shapes