Yes
a figure
YES!!! It is the shortest distance between two points.
It could be a circle or a sphere
A circle (2D) or a sphere (3D)
Yes
a figure
line segment
Math
YES!!! It is the shortest distance between two points.
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
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!
circumscribed
Circumscribing.