MathDB
Sum of inradii does not exceed M

Source: Kvant Magazine No. 1 2021 M2635

March 9, 2023
geometryinequalitiesinradiusKvant

Problem Statement

In the triangle ABCABC, the lengths of the sides BC,CABC, CA and ABAB are a,ba,b and cc{} respectively. Several segments are drawn from the vertex CC{}, which cut the triangle ABCABC into several triangles. Find the smallest number MM{} for which, with each such cut, the sum of the radii of the circles inscribed in triangles does not exceed MM{}.
Porposed by O. Titov