# Chapter 10 - Geometry - 10.3 Polygons, Perimeter, and Tessellations - Exercise Set 10.3: 16

perimeter = $14$ meters

#### Work Step by Step

RECALL: (1) The perimeter of a polygon is equal to the sum of the lengths of all its sides. (2) A square has four equal sides. This means that the three unknown side lengths of the square are all $3.5$ meters. Add the lengths of all the sides to find the perimeter: perimeter = $3.5+3.5+3.5+3.5= 14$ meters.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.