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橢圓包絡線
Author:
rachmaninoff
GeoGebra
New Resources
第八周作业
兩組對邊相等的四邊形
兩位數加法
兩位數除以一位數（二）
找出對稱軸
Discover Resources
反演 (Inversion)
三次函数的极点
semicircle
認識半徑
俄罗斯方块
Discover Topics
Linear Regression
Frequency Distribution
Special Points
Quadratic Equations
Linear Equations