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補角關係
Author:
藍邦偉 Blue
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
兩位數加法
Discover Resources
平行四邊形變奏II
賺賠：例2
P63-2
n星角 のコピー
用和或差的平方做因式分解
Discover Topics
Matrices
Polygons
Complex Numbers
Straight Lines
Diagrams