== Incorrect edits == 

 Moreover, I think the article was entirely correct before the edits of August 3. It said: 

 :it takes the form of a regular pentagon with an obtuse isosceles triangle attached to one of its sides, with the apex of the triangle at unit distance from the opposite pentagon vertex. 

 As far as I can see this is an accurate description of Graham's Figure 5a, while the replacement text is not. And the original graph here was, as far as I can see, an exact replica of Graham's Figure 5a (rotated 180°). Thus our original wording above referring to the "apex of the triangle" refers to the bottom point in Graham's Figure 5a and equivalently the top point in our original graph. 

 So I'm reverting to the Aug.3 status quo ante.