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平行線的性質
Author:
李春培
平行線的性質
GeoGebra
New Resources
異分母分數減法
畫出對稱圖形
兩組對邊相等和有直角的四邊形
兩位數加法
兩位數除以一位數（一）
Discover Resources
科博館的水畢氏三角
snooker
層層套疊的四邊形
空间立方体
连杆
Discover Topics
Hyperbola
Percentages
Algebra
Diagrams
Frequency Distribution