A rectangle has a perimeter of 20m express the area

Because the perimeter is 20m, the short sides of the rectangle can be 2m and the long sides are 8m (since 2m + 2m + 8m + 8m = 20m)

And since we figured out 2 of the side lengths (2 and 8), we can figure out the area

2 x 8 = 16

Therefore, the area is 16m