"Space" is usually understood to be a 3-dimensional "volume", and in that sense,
there is no 'space' inside a circle.
A circle has "area", equal to (pi) times the square of the circle's radius.
Chat with our AI personalities
It is its surface area
Density
It is the amount of three dimensional space occupied by a 3-d shape.
Probably not. We use the term 'volume' to express the amount of space occupied by three-dimensional object.
An inscribed circle, possibly.