How to split/slice a polygon without subdivide? So I'm relatively new to Blender AND human modelling and was working on this low poly CG character. This torso was built from a cylinder primitive and now I want to split/slice at the very bottom face in two (then I can cut half of it and mirror, extrude the leg or whatever). 

The face can't be subdivided and I just want to slice the face in two along the line (shown in the picture as a cyan line) connecting the center vertices.



This is Blender 2.66. What do I do to accomplish this?
You could use the knife tool. Press K and then click where you want to make cuts. Press &#9166; Enter or Space to confirm:



Or you could use the join tool. Select the vertices you want to connect with an edge and press J: