Circle 4 = split a circle in 4 equal area pieces with minimum perimeter
origin of coordinates: in the middle of the circle
if there are symmetries in the solution the data are given only for the significant part
vertex 1 (-0.183427791699874, 0)
arc 11 (-5.92064394641676,-3.31238329132486) 6.62476658264973 [centercoordinates and radius]
yields the following cutlength (radius being 1)
CL = 3.92887114473208