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心電感應
Author:
李春培
GeoGebra
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画直线等分三角形的面积
找出對稱軸
【案例】2013年安徽高考15题
三位數除以一位數(二)
異分母分數減法
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正n邊形內角與外角
地球儀5
proof51 柯承志
glt-h02-00-正方形折成三角錐
地球-分區著色
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Tree Diagrams
Probability
Cuboid
General Quadrilateral
Variance