Problem Solving (PS) | A square picture frame has an outer perimeter of 36 inches and is 1 in

Perimeter of a square is 4s, outer perimeter = 36 inches, 4s = 36, each outer edge is 36/4 = 9 inches.

The border is 1 inch wide on all sides. To find the inner perimeter of the frame, subtract two inches from each side of the outer perimeter.

Imagine a picture inside, and that it is centered (which is equivalent
...

---