The distance between the origin when a number and point representing the real number

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.

right

step-by-step explanation:

$12. that is my answer.