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折正五邊形
Author:
賴詩唐
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
拼砌四邊形
兩位數除以一位數（二）
四邊形的特性
Discover Resources
公切線的條數
交點的極限
平移法（四）
垂心與垂線
圆的面积展开的副本
Discover Topics
Natural Numbers
Logic
Probability
Square
Division