How to model a frustum with specific radii? I'm working on a maths assignment and I need to create a frustum (cone section). My first thought was to use a cylinder, but I'm unsure how to do it. So,  could anyone explain, step by step, how to make such an object?
Press ShiftA and choose Add Cone:





Press T to show the Tool tab.

The Radius 2 will allow you to make the top flat.



Radius 1 is the base radius, and Depth will determine it's height.

Another option to access the tool's proerties is by pressing F6