a circle
On a sphere, all points on the surface are equidistant from the center.
A sphere
A sphere
A rounded figure that has all surface points equidistant from the center is a sphere. A common object that is a sphere is a tennis ball.
A circle
sphere
A sphere.
A sphere
sphere
A circle (2D) or a sphere (3D)
That would be a circle or a sphere. sphere.
A circle is a round figure with all points equidistant from the center. Radii of equal length is the main defining characteristic of a circle.