The perimeter of a square is directly proportional to the length of a side, and its area is directly proportional to the square of the length of a side. if the perimeter of a square is multiplied by 5, then its area is multiplied by

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.