S4a = split a square in 4 equal area pieces with minimum perimeter origin of coordinates: in the middle of the square if there are symmetries in the solution the data are given only for the significant part border (-0.5,-0.5) (-0.5,+0.5) (+0.5,-0.5) (+0.5,+0.5) vertex 1 ( 0, 0.234785392) arc 11 (-0.383320867,-0.429145825) 0.766641733 [centercoordinates and radius] vertex 2 ( 0.334809806,-0.160765714) arc 21 = arc 11 arc 22 ( 0.5, 0.825498844) 1.000002789 [centercoordinates and radius] arc 23 ( 0, 0.115311235) 0.433954016 [centercoordinates and radius] yields the following cutlength CL = 2.419232122