Analysis: The area of rectangle and square is 1225cm2. By decomposing the prime factor, it can be concluded that the side length of the square is 35cm and the perimeter is 140cm. The length of the rectangle is 1225cm, the width is 1cm and the circumference is 2452cm；. It is 49cm long and 25cm wide, so the circumference is 148cm. The area of the circle is 1256cm2 and the circumference is125.6cm..

Answer: the area of these three figures is positive =S and the length is less than s circle, while the circumference of rectangle is the largest and that of circle is the smallest. It can be deduced that the circumference of a circle is smaller than that of a square when the areas are equal. If the perimeters are equal, the area of circle > square > rectangle.