With G1 at 440 royal cubits as it truly is, then G2 - either you double both g1 , g2 or not turns out at 324 royal cubits , where it actually is 411.15 royal cubits.
Then depending on if you have doubled the G1 , G2 diagonals, G3 either turns out to 112 royal cubits or 224 royal cubits. It is actually 201.5 royal cubits. The error in both cases is too big.
Post Edited (08-Feb-12 20:22)