(1) It is known that the side lengths of a lease of two similar triangles cities are 35cm and 14cm respectively, so the similarity ratio is 34: 14, the perimeter of the triangle with large size is X, and the triangle with small size is 14/35 X, and according to the meaning of the question, X-/kloc. If the solution is X= 100, then 14/35 X =40 A: the perimeter of the big triangle is 100cm, and the perimeter of the small triangle is 40cm (2). Then the small triangle is 4/25Y Y- 4/25Y=420, while Y=500 and 4/25Y=80. Let the area of the big triangle be 500 square centimeters and the area of the small triangle be 80 square centimeters.