1.Find the area of the convex quadrilateral with vertices (1, 5), (2, 3), (7, 6) and (7, 1).
See the image here
We can use something known as Pick's Theorem to solve this
Note...a lattice point = a point with integer coordinates
Area = number of boundary lattice points /2 + number of interior lattice points - 1 =
(4/2) + 16 - 1 =
2 + 16 - 1 =
17