The A3 coordinate is (-4 root number 2, 4 root number 2).

A4 coordinate is (-4 root number 2, -4 root number 2).

The A5 coordinate is (6 elements 2, -4 elements 2).

The A6 coordinate is (6 root numbers 2, 8 root numbers 2).

Then the distance between A6 and O is OA6= root number [(6 root number 2) 2+(8 root number 2) 2] = root number (72+ 128)= 10 root number 2.