You make a map to your house on a 3-inch wide by 5-inch wide index card. what will be the perimeter of your map if you use a copier to enlarge it so it will be 8in long.. You make a map to your house on a 3-inch wide by 5-inch wide index card. what will be the perimeter of your map if you use a copier to enlarge it so it will be 8in long.