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thm 11,12
Author:
johnmayhk
Topic:
Circle
chord length vs distance from centre
GeoGebra
New Resources
空间中两直线的位置关系
斜率的值
兩位數除以一位數（二）
【案例】2013年安徽高考15题
画直线等分三角形的面积
Discover Resources
telling the time
角度比較
Similar triangles inscribed iteration400
立體圖形
函数作图工具的副本
Discover Topics
Power Functions
Variance
Statistics
Parametric Curves
Straight Lines