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和的完全平方
Author:
連琨銘
GeoGebra
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拼砌四邊形
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
兩組對邊相等的四邊形
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大邊對大角
sghf
莫比烏斯帶01
拋物線5--包絡線法
幂函数
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Subtraction
Constructions
Sphere
Kite
Mathematics