Triangular wire would most likely be a measured width of one of the flats, so long as all sides are equal. Now you've given me another idea...Triangular wire! For what it's worth, square wire seems to fit very well without issue in most all post holes I've used it in.
I've melted it numerous...
All depends on how you draw it, the drawing you have provided above would give unfair advantage to the circle since your shapes do not have equal circumfrential perimeter(Your circle is about 14% larger). You will note when comparing the diameter of a circle to the side length of a square we...
Found this on a random Google-fu of my website name... You have captured my interest. Allow me to introduce myself, I am Kevin from Squareohm. Ask me anything you would like and I will try to answer it as completely as I can. My prior occupations include many areas of the automotive...