Which is the best strategy to use to solve this problem?

sophie wants to make a large rectangular sign that has an area of 60 square feet. she wants to put a border around the sign, but she wants to use as little border material as possible.

what are the dimensions sophie should use for this sign?

a.
write a number sentence.

use a number sentence to calculate the area of a rectangle. use guess and check to find two numbers that when multiplied will give a product of 60.

b.
make a list.

create a list of all possible whole-number combinations of length and width that would equal an area of 60 square feet. then start calculating the perimeter of each rectangle. look for a pattern to decrease the number of calculations you have to make.

c.
use objects to model the problem.

arrange 60 square tiles in different patterns that create a rectangular shape. count the number of tiles on the perimeter of each of the shapes.