How do you find the surface area and volume of a sphere?

Spheres

A sphere is the set of all points in space equidistant from a given point called the center.

S.A.= 4pi r squared

Calculate the surface area:

SA= 4 pi r squared

SA= 4pi(18) squared

SA= 1,296pi squared

V= 4 pi r cubed/3

Calculate the volume:

V= 4 pi r cubed/3

V= 4 pi (8.7) cubed/3

V= 2,634.012pi/3

V= 878.004pi cm cubed

1st sphere

2nd sphere