The sphere is a three-dimensional shape. A sphere is round, has no edges, and is a solid shape. The sphere is three dimensional solid, that has surface area and volume.The playing ball, balloon, and even light bulbs are examples of sphere shape.
Important Facts on Sphere
- A sphere is perfectly symmetrical
- A sphere is not a polyhedron
- All the points on the surface are equidistant from the center
- A sphere does not have a surface of centers
- A sphere has constant mean curvature
- A sphere has a constant width and circumference.
Important Elements of a Sphere Shape
Radius: The distance between the center of a sphere and its surface is called the radius. It is denoted by the letter r.
Diameter: Think of the diameter as the longest straight line you can put inside a sphere. The diameter passes through the center and joins two opposite points on the surface of a sphere. Its value is always twice that of the radius. It is denoted by the letter d. The formula to calculate the diameter of a sphere is 2r. d =
Circumference: The circumference of a sphere can be defined as the greatest cross-section of a circle that we can cut from a sphere. The formula for the circumference of a sphere is given by 2
Surface Area: The surface area of a sphere is the total area of its rolling surface. The formula to calculate the surface area of a sphere is given by,
SA = 4 , where r is the radius of the circle and π(pi) is approximately 3.14.
It is measured in square units.
Volume: The volume of a sphere can be defined as the capacity of a liquid that the sphere would hold if it were completely hollow.