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三圓外切2
Author:
AlexWang
GeoGebra
New Resources
兩組對邊相等的四邊形
第八周作业
找出對稱軸
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
Discover Resources
trigonometry3
不規則圖形的周界(intro)
切割正十二面體
venn图
旋轉正方形
Discover Topics
Volume
Conic Sections
Sequences and Series
Quadratic Functions
Reflection