#### Answer

perimeter is 180 ft

#### Work Step by Step

Since the figure is a rectangle with a corner notched out, we know that the 2 vertical lines on the left have a combined length equal to the length of the right side. We also know that the combined length of the 2 horizontal lines on the bottom have a combined length equal to the length of the top side.
Therefore the perimeter is
$60+60+30+30=180$