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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
画直线等分三角形的面积
直角坐標平面上的旋轉變換
算柱 (兩位數)
兩位數加法
異分母分數減法
Discover Resources
七巧板
ma_test
q1: triangle with 3 equal part
homework3
平行线间的等积变形-第一题
Discover Topics
Parallelogram
Stochastic Process or Random Process
Translation
Root
Centroid or Barycenter