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包絡線：橢圓
Author:
羅驥韡 (Pegasus Roe)
Topic:
Ellipse
GeoGebra
New Resources
柱體建築師
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
錐體建築師
兩位數除以一位數（二）
Discover Resources
正9邊形
clock
Triangle 02
cute panda
固定周界長方形的面積變化
Discover Topics
Parametric Curves
Step Functions
Terms
Median Line
Geometric Transformations