MathDB
Maximizing a length

Source: http://www.olimpiadamatematica.es/platea.pntic.mec.es/_csanchez/olimp_1963-2004/OME2004.pdf

November 14, 2016
geometry

Problem Statement

We are given an equilateral triangle ABCABC, of side aa, inside its circumscribed circle. We consider the smallest of the two portions of circle limited between ABAB and the circumference. If we consider parallel lines to BCBC, some of them cut the portion of circle in a segment. Which is the maximum possible length for one of the segments?