premise: imaginary and unrealistic piece approximated by me in the casket: the purpose was to quote two types of sunshades on a piece and understand if it is wrong everything (if you as you quote) /in part (what I wrong and how you quote)
the radius of the bay of the middle asola, what is called "joint holes" then is an angle between the centers of the asola.
if the measurements are full, you can quote the distance between the centers of the circles of the sunflowers and not the corner.