Combinatorics is a part of math focused on counting principles of finite quantities. It does not really have much to do with triangles, much less the Pythagorean theorem.
GREEN'S THEOREM: if m=m(x,y) and n= n(x,y) are the continuous functions and also partial differential in a region 'r' of x,y plane bounded by a simple closed curve c.DIVERGENCE THEOREM:if f is a...