How to cover line or polygon in CST microstudio 2011?

I am designing a bow-tie antenna. I need to draw a triangle using polygon. but i want to cover lines that lines or triangle with some material, thickness, width. How can we do that in CST Microwave Studio 2011?

,,,alihamidmir, these images might be your help...

This option covers the whole triangle. I just want to cover the lines. In other words, I want to assign only the polygon some material.

,,, you,not know what you want ...!...http://www.youtube.com/watch?v=xY_fN4vI8f0

You want to draw a line (polyline) with width?

We can use add trace and select the desired polygon to give width, material , thickness etc.
BTW thanks.
----------- updated -------------
yes i wanted to draw a triangle in CST Studio. Three lines(polylines) will form a triangle. then i want to assign those lines some material, thickness and width. i couldn't find the option. but i got it now. its by add trace.

,,, and round wire, how do you ... ?
,,, better, study this...http://www.youtube.com/watch?v=xY_fN4vI8f0