locus of a circumecenter, given a circle lying inside an ellipse
Source: 2015 Sharygin Geometry Olympiad Correspondence Round P20
August 2, 2018
conicsellipseLocusgeometrycircumcircle
Problem Statement
Given are a circle and an ellipse lying inside it with focus . Find the locus of the circumcenters of triangles , where is a chord of the circle touching the ellipse.