IMO Shortlist 2014 problem G2
Dodao/la:
arhiva7. svibnja 2017. Let be a triangle. The points , , and lie on the segments , , and , respectively, such that the lines , , and intersect in a common point. Prove that it is possible to choose two of the triangles , , and whose inradii sum up to at least the inradius of the triangle .
Let $ABC$ be a triangle. The points $K$, $L$, and $M$ lie on the segments $BC$, $CA$, and $AB$, respectively, such that the lines $AK$, $BL$, and $CM$ intersect in a common point. Prove that it is possible to choose two of the triangles $ALM$, $BMK$, and $CKL$ whose inradii sum up to at least the inradius of the triangle $ABC$.
\begin{flushright}\emph{(Estonia)}\end{flushright}
Izvor: https://www.imo-official.org/problems/IMO2014SL.pdf