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外心
Author:
Bennie Liu
GeoGebra
New Resources
球体的体积推导（优化版）
漂亮的摇摆曲线
【案例】圆柱体内放置一个大球六个小球
垂直線的斜率
空间中两直线的位置关系
Discover Resources
三角形的外心
圓切三半圓
年龄问题
三角形的心
正三角形在长方形边上移动加滚动
Discover Topics
Definite Integral
Pythagoras or Pythagorean Theorem
Reflection
Circumcircle or Circumscribed Circle
Set Theory