> These three triangles will now contain enough > information to solve for area. > > Kirby
Caveat: such basic Euclidean techniques apply if this is relatively flat farm land. If you're looking at surface area as an undulating manifold or worse, then you may want some calculus. Or just break it up into more subtriangles is what a surveyor might do. So a first step might be to check with county or city records if you have any reason to think this work has already been done.