A convex polygon is defined as a polygon where all its internal
angles are less than 180 degrees and no edges cross each other. You
can assume the vertex with the smallest x-coordinate (assuming
origin at bottom left) is the first coordinate and other vertices
are numbered in a counter-clockwise direction. Figure 1 shows an
example of such a polygon where V[1] is the first polygon. For
simplicity, you can also assume all polygon vertices have distinct
x and y...