MathDB
2m gon with exactly one pair of parallel sides

Source:

October 10, 2010
modular arithmeticgeometry unsolvedgeometry

Problem Statement

Given a regular convex 2m2m- sided polygon PP, show that there is a 2m2m-sided polygon π\pi with the same vertices as PP (but in different order) such that π\pi has exactly one pair of parallel sides.