LaTeX has some basic drawing instrucion set, see for instance http://en.wikibooks.org/wiki/LaTeX/Picture , but I wouldn't recommended it. One has to keep track of all coordinates (points, line, arrows).
Usually I use some vector graphic software which allows LaTeX expressions in its text box because you have a better and much easier control of the picture, I recommend Xfig or Inkscape. I don't know whether CorelDraw has some LaTeX plugin.