Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
Second solution in Creative category for Area of a Convex Polygon by aquazul
checkio=lambda d:sum(abs((b[0]-d[0][0])*(c[1]-d[0][1])-(b[1]-d[0][1])*(c[0]-d[0][0]))/2 for b,c in zip(d[1:-1],d[2:]))
Feb. 9, 2016