<a href="https://en.wikipedia.org/wiki/Ronald_Graham" class="extiw" title="en:Ronald Graham">Ron Graham's</a> <a href="https://en.wikipedia.org/wiki/Biggest_little_polygon" class="extiw" title="en:Biggest little polygon">biggest little hexagon</a>, the shape with the maximum area among all diameter-one hexagons, has the shape of a irregular equidiagonal pentagon with an isosceles triangle attached to one of its sides; the pairs of points at distance one from each other are shown by the blue line segments. DO NOT USE THIS IMAGE UNTIL ITS GEOMETRY HAS BEEN CORRECTED: IT INCORRECTLY SHOWS A REGULAR PENTAGON.
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
<span class="int-own-work" lang="en">Own work</span>