Joe is trying to find the perimeter around his rectangular playground. He knows that the length is 8 feet, and the width is 4 feet. The perimeter of the playground is ​

feet.

The formula to find the perimeter of a rectangle is P = 2(length + width).

Given that the length is 8 feet and the width is 4 feet, we can substitute these values into the formula:

P = 2(8 + 4)
P = 2(12)
P = 24

Therefore, the perimeter of Joe's rectangular playground is 24 feet.