end points of each side. finally points with largest or smallest value of give you the maximum and minimum of to give you a better idea, i'll show you how to do it for one of the sides:
for example on where the equation of the segment AB is: therefore on AB we have:
now gives us: and thus . you also need to check the end points, i.e. x = 0 and
x = 2. at x = 0, we have and at x = 2 we have . now do the same for other two sides.