It is a line segment.
It is the set of all points [from some fixed point] at a distance of 1 unit, where the points on the surface of the sphere are included in the set.
A solid sphere perhaps?
A set of points that are equidistant from a fixed point, known as the center, forms a geometric shape called a circle. In a two-dimensional plane, all points on the circle are the same distance from the center, which is defined as the radius. This concept can be extended to higher dimensions, where the set of points equidistant from a center forms a sphere in three-dimensional space.
this is called a line.
The solution set is the set of all points representing solutions.
This set of points forms a circle with the fixed point as its center.
That set of points forms what is known as a "circle".
an ellipse.
A set of all points is how various shapes are made in geometry. Lines are sets of points, and so are surfaces. Circles are sets of all points that are a fixed distance from a central point. All geometric shapes are made from sets of all points.
That's false
the set of points equidistant from a fixed point
It is the set of all points [from some fixed point] at a distance of 1 unit, where the points on the surface of the sphere are included in the set.
A circle.
The set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant. - APEX
corner...?
A circle is the set of all points in two dimensional space that are at the same distance from some fixed point.
It is the set of all points that are at a distance of 1 cm from a fixed point (called the centre).