min length from (8, 2) to (5, 11) under conditions
Source: Spanish Mathematical Olympiad 1973 P7
December 23, 2022
analytic geometrygeometryinequalitiesGeometric Inequalities
Problem Statement
The two points and are considered in the plane. A mobile moves from to according to a path that has to fulfill the following conditions: The moving part of and arrives at a point on the -axis, along which it travels a segment of length , then it departs from this axis and goes towards a point on the axis, on which travels a segment of length , separates from the axis finally and goes towards the point . Among all the possible paths, determine the one with the minimum length, thus like this same length.