  Motivated by Elementary Problem B-1172 in the Fibonacci Quarterly (vol. 53,
no. 3, pg. 273), formulas for the areas of triangles and other polygons having
vertices with coordinates taken from various sequences of integers are
obtained. The sequences discussed are Polygonal number sequences as well as
Fibonacci, Lucas, Jacobsthal, Jacobsthal-Lucas, Pell, Pell-Lucas, and
Generalized Fibonacci sequences. The polygons have vertices with the form
$(p_n,p_{n+k}),\,\, (p_{n+2k},p_{n+3k}),\,\,\dots
,(p_{n+(2m-2)k},p_{n+(2m-1)k)}$.
