Geometry Mathley 6.1 sum of \delta_(I_x)=4R
Source:
June 7, 2020
geometrycircumradiusexcenterincenterdistancecircumcircleTangents
Problem Statement
Show that the circumradius of a triangle equals the arithmetic mean of the oriented distances from its incenter and three excenters to any tangent to its circumcircle. In other words, if denotes the distance from a point to , then with appropriate choices of signs, we have
Luis González