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三角形內心_不完美版
Author:
lihsing.zen
Topic:
Centroid or Barycenter
GeoGebra
New Resources
兩位數除以一位數（一）
兩位數加法
【案例】2013年安徽高考15题
異分母分數減法
找出對稱軸
Discover Resources
task1
分數乘法3
some circles
量角器
高考椭圆题的动态演示2.许兴华数学
Discover Topics
Vectors 3D (Three-Dimensional)
Numbers
Parametric Curves
Equations
Random Variables