Diameter: The diameter refers to any straight line segment passing through the center of the sphere and having both endpoints on its surface.
Circumference: The circumference refers to the distance around the outer boundary (perimeter) of a circle or spherical object. For spheres, it is given by C = 2πr, where r represents the radius.
Center: The center refers to the point located at an equal distance from all points on the sphere's surface. It acts as its geometric 'heart.'