Let P be a lattice polygon. Assume there are I(P) lattice points in the interior of P, and B(P) lattice points on its boundary. Let A(P) denote the area of P. Then A(P) = I(P) + B(P)/2 - 1
Authored by
placeholder at
, Added: 3 Feb 2006
http://www.cut-the-knot.org/ctk/Pick.shtml
