Aim: How do we find the surface area and volume of a sphere?

By using the right formula you can find the surface area and volume.

First of all what is a sphere?

A sphere is a three demensional solid that has infinity radiis that all connect to the
 main point which is the center.

It looks like this.


In order to find the surafce area you need to do the following:

S.A.= 4 pi r2
Here is an example

Example 1:  r = 3 ft. Then you just substitute the number in the formula.
SA = 4(π)(3 ft)² = 4(π)(9 ft²) = 36π ft² (in terms of π) or 113.0 ft².

Try it on your own:

A sphere has a radius of 3m what is the surface area?