Find the perimeter of the figure.

The perimeter is only the outer edge of the figure. We can split this up into the perimeter of the square, and the perimeter of the rectangle.
Square:
Only 3 sides of the square are visible in the perimeter.
3 + 3 + 3 = 9
Rectangle:
We have one full length, one shortened length, and 2 widths in the perimeter.
2(4) + (8 + 3) + 8 = 27
Figure:
Now that we know the perimeter of the rectangle and square, we need to add them together to find the area of the figure.
27 + 9 = 36
The perimeter is 36 feet.
Hope this helps! :)