Two times the square root of 2...........full diagonal of the 2 square...................connecting neg and post....................................in any quadrant..........1/4.........................the diag. to the end point......vertices of the 2 square from the origin..........is the square root of 2..................it is like a 45/45 right triangle..............whose two smaller sides are one............................1/2 the diagonal of the 2 square..................

2 * square root(2) =

2.82842712475