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正三角錐
Author:
李冠邑
GeoGebra
New Resources
異分母分數減法
三位數除以一位數（二）
球体的体积推导
兩位數除以一位數（一）
【案例】2013年安徽高考15题
Discover Resources
解數學題目
優良作品4(楚耘)
Addition and Subtraction of Directed Numbers (2)
活工(一)Q3
黄金三角形到螺旋线（表格法）
Discover Topics
Isosceles Triangles
Multiplication
Poisson Distribution
Difference and Slope
Statistics