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九點圓
Author:
彭宇辰
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
兩位數加法
兩位數除以一位數（二）
拼砌四邊形
Discover Resources
累積頻數多邊形的應用
指對數函數圖形交點個數
三角形
同心圓
碎形三角形
Discover Topics
Constructions
Prism
Orthocenter
Ratios
Percentages