A circle or a sphere would fit the given description.
Surface of a sphere
Straight line
A circle is the set of all the points that are the same (arbitrary) distance (called the radius) from some (arbitrary) point (called the center).
A sphere
A circle or a sphere
A curved surface on which all points are the same distance from the center is called a sphere.
===> "circle", with center at the "single point" and radius of the "certain distance".
Surface of a sphere
It is a sphere.
The term that describes the point equidistant from all points on the boundary of a circle is the "center" of the circle. This point is located at the midpoint of the radius, and every radius drawn from the center to the circumference is of equal length.
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.
the center of the circleThat point is called the "center" of the circle.
The distance from the center of a lens to one of its focal points is the focal length of the lens.
The set of all points in a plane that are the same distance from a given point, called the center, is known as a circle. The distance from the center to any point on the circle is called the radius. Mathematically, a circle can be defined by the equation ( (x - h)^2 + (y - k)^2 = r^2 ), where ((h, k)) is the center and (r) is the radius.
That shape is called a circle.
a circle
That's called the center