Chapter 4 - Section 4.4 - Adding and Subtracting Like Fractions, Least Common Denominator, and Equivalent Fractions - Exercise Set - Page 261: 42

$1\frac{5}{13}$ foot

To find the perimeter, sum the lengths of the sides. Since all 3 are like fractions, no conversion is needed. $\frac{3}{13}+\frac{6}{13}+\frac{4}{13}+\frac{3}{13}+\frac{2}{13}=\frac{3+6+4+3+2}{13}=\frac{18}{13}=1\frac{5}{13}$