Some Circles in my head

Ok, so I want to make a relatively large circle. Take a 1m (square) tile and shave a thin triangle off one edge, cutting 0.999977032mm in from the corner on one side and meeting flush with the other corner (on that side). Now I’m sure it would look like a square to a casual observer, but if you laid this type of tile end to end it would eventually make a circle 2km in diameter.I think that would be fun (and potentially useful).It would require 6 284 tiles, with about 715mm of overlap, to complete the first layer of the circle. Now I need to work out how long it would take to manufacture that many tiles at what available thickness. (I’m estimating about 50mm)This is one branch of thinking that has been frustrating me for the past week. The writing plans that I’ve been entertaining for half a year have met with a wall of speculation as my brain wrestles on several fronts, trying to pull together a diverse range of fields where I am master of none. Still, I will persist.  "Thinking about circles"[Pen on paper - approx A6]