Volume of a Sphere: The volume of a sphere represents the amount of space enclosed within its boundaries. It is calculated using the formula (4/3)πr^3, where r is the radius.
Radius: The radius is the distance from the center of a sphere to any point on its curved surface. It determines both its size and various properties such as surface area and volume.
Curved Surface: A curved surface refers to any non-flat part or boundary that has curvature in three-dimensional space. In terms of spheres, it specifically describes their outermost layer without considering their interior volume.