A sphere is 3-dimesnional geometrical shape which is said to
be perfectly rounded. A sphere is just like a circle in which all the set of
points is on equal distance **(r)** from
the centre but in 3D space.

## Properties of Sphere

- A sphere is perfectly symmetrical shape.
- There are no edges or vertices in a sphere.
- All the points on a sphere are on same distance from the centre that is radius (r).
- Sphere has one surface.

## Surface Area of Sphere

Surface area of sphere is given by the formula.

*S.A = 4 Ă— Ď€ Ă— r**Â˛*

## Volume of Sphere

Volume of sphere is given by the formula,

*V= (4/3) Ă— Ď€ Ă— rá¶ľ*

x