Farmer Fran has been busy building fences for her chickens, cows, ponies, and pigs. She's almost done! Looking at the blueprints, can you help her figure out the widths of the gates?

Perimeter is the total distance around a shape. To find it, just add up the lengths of all the sides. But what if one side is missing? If you know the perimeter and the lengths of the other sides, you can work backward to figure out the missing length. Now that you know how it works, can you help Farmer Fran with the challenge?