Teacher:	Now, have you thought about a cylinder lately?
Teacher:	What parts are made of it?
Teacher:	If I make a cylinder out of a sheet of paper, how big is it?
Teacher:	How big is a sheet of paper?
Student:	8 1/2 by 11
Teacher:	All right, so if I roll it up can you figure out what parts are which,
Teacher:	like, what's the height of the cylinder?
Student:	8 1/2...
Teacher:	'k. Do you know the formula for volume?
Teacher:	I will give it to you, but do you know what it is?
Student:	Base times height...
Teacher:	Yeah, area of the base times the height let's see, so the volume is height squared h...
Teacher:	So, where is r in this thing?
Teacher:	I think that's something you're going to need to think about.
Teacher:	What's this part of the cylinder?
Student:	Circumference.
Teacher:	And the circumference is what?
Student:	hmm... right
Teacher:	So let's think about this.