Yes
A decagon perhaps
a figure
It could be a circle or a sphere
This is called a discrete set (all points isolated) or a finite set. Finite sets are always discrete.
A circle (2D) or a sphere (3D)
A decagon perhaps
a figure
line segment
Math
segment or line segment both can be uaed
Strictly speaking, the only geometric item that has neither length nor width is a "point", but as such, it is not considered a "figure". A geometric figure is defined as a "set of points". I suppose a point could be thought of as a set containing only one element, but that rather contradicts the intention of the definition where it refers to points in the plural.As Euclid defined it: A figure is that which is contained by any boundary or boundaries.
It could be a circle or a sphere
This is called a discrete set (all points isolated) or a finite set. Finite sets are always discrete.
true
A circle (2D) or a sphere (3D)
If your asking "What is ...?" Then, the answer is a circle. This is the definition of a circle!
It is an collection of an infinite number of points.