Question

what is a circle and how does it look like?

Answer 1

A ROUND PLANE FIGURE WHOSE BOUNDARY CONSISTS OF POINTS EQUIDISTANT FROM A FIXED POINT IS CALLED A CIRCLE

Answer 2

A circle is a locus of a point equidistant from a fixed point on a plane .
Its a enclosed figure , with no vertices or edges having a fixed centre.
It's a 2-dimentional figure.