I would have t hought that if the material of the tiangle has resistance and a diaelectric constant you can convert the coulombs/meter (I don't quite see how /meter squared?) into volts.

I presume you are to solve the Laplace equation on the triangle for the potential at a point x,y. In any case I suspect that you're going to conformally transform the triangle into something else. Any ideas?

I presume you are to solve the Laplace equation on the triangle for the potential at a point x,y. In any case I suspect that you're going to conformally transform the triangle into something else. Any ideas?