Answer:
It is given that, A circle is drawn and new circles have been constructed at the length of the radius in a pattern around the original circle
These Circles are Called Concentric Circles.
This can be explained in the following way.
Consider a circle of radius r, and having center O.Draw as many circles having same center and radius equal to ,r, (r+r=2r),(r+r+r=3r),4r,5r,.......
Since the center of each circle is same.These Circles are Called Concentric Circles.
