$\sqrt{7}$  

 $2\sqrt{3}$  

 $\sqrt{11}$  

 $3\sqrt{2}$  

$r=\ 9$

$\theta=\frac{\pi}{3}$ $.$

$\theta=3$

$r=3$

 $\left(2\ ,\ 30\degree\right)$  

 $\left(2\ ,\ 60\degree\right)$  

 $\left(\sqrt{3},\ 30\degree\right)$  

 $\left(\sqrt{3},\ 60\degree\right)$  

 $\left(4\ ,\ 4\sqrt{3}\right)$  

 $\left(-4\sqrt{3},-4\right)$  

 $\left(4\ \sqrt{2},\ 4\right)$  

 $\left(4\ \sqrt{3},\ 4\right)$