## Elementary Geometry for College Students (5th Edition)

$\overline{DF}=\sqrt 34$
$5^{2}+3^{2}=\overline{DF}^{2}$ $25+9=\overline{DF}^{2}$ $34=\overline{DF}^{2}$ Square root each side $\sqrt 34 = \overline{DF}$