(4-17-2012)Aim: How do we find the volume of cones?

(4-17-2012)Aim: How do we find the volume of cones?

Cone 
The volume of a cone is shown by the formula v=1/3πr²h

http://3dshapes.org/images/stories/3dshapesclipart/thumbs-medium/cone1.pngExample:
What is the volume of a cone with a radius of 3 and a height of 9?
Leave it in the terms of π.
Answer:
v=1/3πr²h
v=1/3π3²(9)
=π9(9)/3
=81π/3
=27π units^3

Try it yourself!
What is the volume of a cone with a radius of 2 and a height of 7?