MathDB
combo geo with circular crown , 650 points in a circle 2003 Portugal p3

Source:

October 13, 2020
geometrypointscombinatorial geometry

Problem Statement

Raquel painted 650650 points in a circle with a radius of 1616 cm. Shows that there is a circular crown with 22 cm of inner radius and 33 cm of outer radius that contain at least 1010 of these points.