> (Assuming the chip-box is circular) > > The circumference is 2. > Circumference = 2 * pi * radius, so > 2 = 2 * pi * radius, so > radius = 1/pi > therefore the diameter = 2* radius = 2/pi
your assumption that the chip-box i circular is not correct. It is very easy to construct it from a sheet of paper, and see that the chip-box is not circular, it is even not elliptic. The solution is simple, but not quite straightforward.