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三角四星
Author:
吳秉沂
GeoGebra
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三位數除以一位數（二）
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
異分母分數減法
錐體建築師
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公弦
圓形墊圈 (Washer)
HW 1
题1
椭圆内切圆链
Discover Topics
Straight Lines
Differential Equation
Correlation
Frequency Distribution
Triangles