This is the definition of a circle
I believe that's a circle...
Circle
That set of points forms what is known as a "circle".
That's a circle around the center, in the plane.
a circle
They are called equidistant points and form points on a sphere for a solid or a circle on a plane figure.
A circle is the set of all points, on a plane, that is at a specific distance from a specified point (the center).A circle is the set of all points, on a plane, that is at a specific distance from a specified point (the center).A circle is the set of all points, on a plane, that is at a specific distance from a specified point (the center).A circle is the set of all points, on a plane, that is at a specific distance from a specified point (the center).
Points that are within the same plane are called co-planer.
A circle is the set of all points in a plane that are equidistant from a given point, called the center.
The shape of a circle is round. Circles are plane shapes that have all points that are the same distance from the center.
All points on the circumference of a circle drawn on a plane are equidistant from the single point on the plane which is the center of the circle.
Because the center of the fan is attacked to something, and if the fan is relatively rigid, other points on the fan keep the same distance from that center. The set of points in a plane that has the same distance from the center is called a circle.