A rectangle and a square both have a perimeter of 20. The rectangle has a length of 6.

Question

Which shape has a greater area? How do you know?

Answer 1

The square has a perimeter of 20, so its side is 5
then its area is 25 units square, the same a the rectangle
the rectangle is
length x width
= 6w = 25
w = 25/6 units

Answer 2

Thanks!