## Thinking Mathematically (6th Edition)

perimeter = $44 \text{ m}$
The height of the polygon is 10 meters. This means that the unknown vertical side length is: $=10-2 = 8$ m The width of the polygon is 12 meters. This means that the unknown horizontal side length is: $=12 - 7 = 5$ m The perimeter of a polygon is equal to the sum of all the lengths of its sides. Thus, the perimeter of the polygon is: $=(12 + 10 + 7 + 8 + 5 + 2) \text{ m} \\=44 \text{ m}$