Hi,
Perhaps I can help, but I did not understand exactly what you are aiming for. A snapshot or an example image may help.
Correct me if I am wrong, the formula you have is of a hexagon with flat sides on top/bottom, whereas, you need a similar formula for a hexagon which is rotated 30° (which will make the hexagon's flat sides on right/left)
Also, by 60/70 do you mean, its radius of 60 and 70 ?