Gerard ran out of tile for his patio. the width of the remaining area is 2 2/9 feet. the length of the remaining area is 7 feet. how much does gerard have left to tile?

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.