function omkrets = polygonCircum (x,y)
side = 1: length (x) - 1
for i = 1: length (x) - 1
    x = x(i);
    for j = 1 : length (y) - 1
        y = y(j);
	side(i) = sqrt((x(i)-x(i+1)^2)+((y(j)-y(j+1))^2));
    end
end
omkrets = sum (side);
end