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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
球體建築師
找出對稱軸
三位數除以一位數（一）
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
Discover Resources
直線與圓(直線方程式圖形特性2)
BEES定理2
slopefield_rational function
Question 1
三年級除法(三)：一位數除三位數
Discover Topics
Stochastic Process or Random Process
Tree Diagrams
Angles
Random Experiments
Means