Solution:
1. In one Dimension
Draw any line , mark O, to represent center i.e origin and mark two points a and b on opposite side of O, where a and b are any two real number.
then,
2. In two dimension
Origin,O =(0,0), A point in any of four quadrants=A(x,y),B(-x,y),C(-x,-y),D(x,-y).
Then , OA =OB=OC=OD=
, where x, y are any two same or distinct real number.