Program for drawing geometry What program do math teachers use to draw geometry, or what is used in books?
I want the drawing to look EXACTLY (I mean the same font and the same line thickness etc.) as in the screenshot I send. Found many programs, but not a one to do it in this way. Please help! Here is the image: 


I have not used this program in a few years, so I don't know what changes have occurred lately, but geometer's sketchpad was really nice and probably still is.  It is not free, but there is a free trial I think.  
http://www.keycurriculum.com/sketchpad.1.html
