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拋物線5-包絡線法
Author:
15黃瀚霆
GeoGebra
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兩組對邊相等的四邊形
画直线等分三角形的面积
錐體建築師
【案例】2013年安徽高考15题
異分母分數減法
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三角形的心
圆的面积展开
Li Shan Lan Cone Logarithm
國旗
奥倍尔定理
Discover Topics
Subtraction
Standard Deviation
Random Variables
Variance
Quadrilaterals