now... notice the left-side of the picture. that's the points and shape... ok.. notice the left-side, is really just two rectangles and and four triangles stacked up to each other at the edges.
so.. .just get the area of each rectangle and each triangle, sum them up, and that's the area of the shape.
you can pretty much get the length, width and height of the rectangles and triangles from the grid.
