This week in math one thing that I learned how to do was how to calculate the surface area and the volume of a sphere. I also learned that two cones can fit inside a sphere, and one cone can fit inside a hemisphere, only if they have the same radius.

Surface area:

1. The formula for the surface area of a sphere is 4
2. If we know that the radius of the sphere is 11.5cm then we just input it into the  formula ie. 4(11.5)^{2}
3. You then square the radius ie. 4(132.25) and multiply across to get your answer
4. Round to the nearest 1oth of a cm

volume:

1. The formula for the volume of a sphere is
2. Since we know the radius, again, we just input it into the equation ie.
3.  To help you may want to rewrite the equation so 3 is the denominator and  is the numerator, it means the same thing as  
4. You then cube the radius ie.   and multiply across to get your answer, if you rewrote the equation as one fraction the you multiply across the top and divide by 3 to get your answer
5. Round answer to nearest 10th of a cm