Correct. To convert from radians to degrees, multiply the radian measure by $\displaystyle\frac{{{180}}^{\circ}}{\pi}\usepackage{cmbright}\Huge\$ :

$\displaystyle\frac{{{3}\pi}}{{5}}=\frac{{{3}\pi}}{{5}}\cdot\frac{{{180}}^{\circ}}{\pi}=\frac{{{{540}}^{\circ}}}{{5}}={{108}}^{\circ}\usepackage{cmbright}\Huge\$

$\displaystyle\frac{{{4}\pi}}{{9}}=\frac{{{4}\pi}}{{9}}\cdot\frac{{{180}}^{\circ}}{\pi}=\frac{{4}}{{1}}\cdot\frac{{{{180}}^{\circ}}}{{9}}={4}\cdot{{20}}^{\circ}={{80}}^{\circ}\usepackage{cmbright}\Huge\$

$\displaystyle{3}=\frac{{3}}{{1}}\cdot\frac{{{180}}^{\circ}}{\pi}=\frac{{{540}}^{\circ}}{\pi}={171.887}{\ldots}^{\circ}\approx{{172}}^{\circ}\usepackage{cmbright}\Huge\$