Geometry: Common Core (15th Edition)

$P=22\text{ in}$
The perimeter $P$ of a polygon is the sum of the length of its sides. For rectangles in particular, the formula for perimeter is $P=2b+2h$. The figure shows a rectangle with a base of $7$ and a height of $4$. We plug these values into the formula and simplify: $$P=2(7)+2(4)$$$$P=14+8$$$$P=22\text{ in}$$