Possibly a simple question. Math is not my strong point Anyway I have an octagon and I know the the distance of each side (5.348") and I need to find out the distance of the furthest point to point. (Imagine each point of the octagon is a small hole) I just need something simple to use on a calculator. For instance to find out the spacing of square (4 hole) bolt circles (B.C.) I divide the B.C. by 1.414 and I get my spacing. Is their a simple formula for an octagonal B.C.? I hope this isn't too confusing. Thanks much