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min or max absolute sum of distances of a point from vertices

Source: Spanish Mathematical Olympiad 1972 P2

December 5, 2022
geometryGeometric Inequalitiesanalytic geometryinequalities

Problem Statement

A point moves on the sides of the triangle ABCABC, defined by the vertices A(āˆ’1.8,0)A(-1.8, 0), B(3.2,0)B(3.2, 0), C(0,2.4)C(0, 2.4) . Determine the positions of said point, in which the sum of their distance to the three vertices is absolute maximum or minimum. https://cdn.artofproblemsolving.com/attachments/2/5/9e5bb48cbeefaa5f4c069532bf5605b9c1f5ea.png