MathDB
Find the locus of point

Source: IberoAmerican Mathematical Olympiad 2004, Problem 2

May 23, 2007
geometrycircumcircleinductionratiogeometric transformationreflectionpower of a point

Problem Statement

In the plane are given a circle with center O O and radius r r and a point A A outside the circle. For any point M M on the circle, let N N be the diametrically opposite point. Find the locus of the circumcenter of triangle AMN AMN when M M describes the circle.