[Blindmath] graphics

[Haden Pike]

Hi all,

This might be off topic for this list, but figured I'd ask here in case 
there's a mathematical formula for figuring out what I need.

Anyway, as part of my intro to programming class, we are being asked to 
draw graphics on the screen in order to learn about objects.  I already 
know about them,
but this class is required for Computer science majors, so I still have 
to do the assignment.  My question is this.  Is there any way a blind 
person can
hope to get a since of what size something is, when specified in 
pixels?  For example, if I gave a rectangle a width of 100 pixels and a 
height of 150
pixels, how could I determine what size the rectangle will be on the 
screen.

Thanks for any help,
Haden