It is the diameter of the circle or the sphere
the anwser is diameter
A sphere is three dimensional, a circle is not. So a tennis ball is sphere not a circle You can draw a circle on paper but is is not a sphere.
The precise definition of the word 'centres' is the middle point of a circle or a sphere. This means the point is an equal distance from every point on the circle/sphere.
A straight line passing from side to side going through the middle of a circle or sphere is a diameter.
circle is flat and sphere is a ball
No a circle is the 2d projection ("shadow") of a sphere.
it's a semi-sphere circle is to semi-circle as sphere is to semi-sphere
no, it is sphere is not a perfect circle. because sphere is 3dimensional figure and circle is 2 dimensional figure
A sphere is a 3D circle. Like a baseball.