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包絡線：橢圓
Author:
羅驥韡 (Pegasus Roe)
Topic:
Ellipse
GeoGebra
New Resources
sanjiaohanshu
兩組對邊相等的四邊形
近似值：有效數字
四邊形的特性
四邉形 (四年級) 教師版
Discover Resources
task7
day01_04
橢圓3--平行四邊形法
生长的海螺
作垂线或平行线
Discover Topics
Special Points
Linear Functions
Definite Integral
Vectors
Cube