## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 1 - Tools of Geometry - 1-8 Perimeter, Circumference, and Area - Practice and Problem-Solving Exercises: 8

#### Answer

$P=36\text{ cm}$

#### Work Step by Step

The perimeter $P$ of a polygon is the sum of the length of its sides. For squares in particular, the formula for perimeter is $P=4s$. The figure shows a square with a side length of $9\text{ cm}$. We plug this value into the formula and simplify: $$P=4(9)$$$$P=36\text{ cm}$$

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