MathDB
Regular n-gon

Source:

December 20, 2005

Problem Statement

Point BB is in the exterior of the regular nn-sided polygon A1A2An,A_1A_2\cdots A_n, and A1A2BA_1A_2B is an equilateral triangle. What is the largest value of nn for which An,A1,A_n, A_1, and BB are consecutive vertices of a regular polygon?