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.
It is its surface area
The term that refers to the amount of space an object takes up is "volume." It is a measure of the amount of three-dimensional space occupied by the object.
The term that describes the amount of space occupied by a substance is "volume." It refers to the quantity of three-dimensional space enclosed by a substance or object.
No non-fictional astronomical body know as black circle. If the question is meant to employ the term 'black hole' in space, what a black hole does is to exist.
surface area
volume
Acting space is the amount of space on a stage or wherever you are performing you can use to perform on.
The amount of space that something occupies.
Density
volume
The term used to indicate the space a weight of gas will occupy is called "volume." It refers to the amount of physical space that a gas occupies.
The term "footprint" is often used to refer to the amount of space on a desk or table that a computer occupies. It describes how much physical space the computer system takes up in a workspace.