Pizza portions

Here are the calculated differences between even and odd cuts of a pizza.  The pizza had a radius of 1, with the centre of cutting off-set by 5/19 in the x direction and by 2/7 of the nose angle of the slice in the y direction.  
CutsEven slices areaOdd slices area
4     1.570796326795 1.570796326795
5      1.570818277231.570778825867
6        As 4As 4
7      1.570796173805 1.570796479785
8     As 4As 4
9      1.5707963284861.570796325104
10    As 4As 4
11       1.570796326774 1.570796326816
12      As 4As 4
13     As 4 As 4

  The difference is never great and is less than 1/1000000000 by thirteen cuts.  The centre was always in slice 1. The way I calculated this is quite simple, but relies on functions using points, so is not conducive to proofing things, just getting results.