What's the easiest way to draw common 2-d shapes with Maple 12?

Also, let's say that i have a triagle, how do I label the verteces and input text in and around the shape?

I wouldn't be asking this if I new how to find what I wanted in help.
God bless maple for being so user friendly, but I'm completely new to the thing.

Also, could someone tell me how to do the same thing, only with sigma plot?