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joining midpoints of opposite sides of circumscribed hexagon

Source: Sharygin Geometry Olympiad 2017 First Round P21 grades 10-11

July 23, 2018
geometryconvexhexagonmaximummidpoint

Problem Statement

A convex hexagon is circumscribed about a circle of radius 11. Consider the three segments joining the midpoints of its opposite sides. Find the greatest real number rr such that the length of at least one segment is at least r.r.