MathDB
circle touches three pairwise disjoint circles with collinear centers

Source: 1952 Hungary - Kürschák Competition p1

October 10, 2022
geometryGeometric Inequalitiestangent circles

Problem Statement

A circle CC touches three pairwise disjoint circles whose centers are collinear and none of which contains any of the others. Show that its radius must be larger than the radius of the middle of the three circles.