max numbers of isosceles triangles by 100 collinear point and 1 outside
Source: December 2020 Ukraine Geometry Olympiad X p2 , XI p2
December 20, 2020
geometrycombinatoricscombinatorial geometryisosceles
Problem Statement
On a straight line lie points and another point outside the line. Which is the biggest the number of isosceles triangles can be formed from the vertices of these points?