Find and Use Alternate (Interior or Exterior) Angles

$\angle{\color{red}{1}}$

$\angle{\color{blueviolet}{2}}$

$\angle{\color{orange}{3}}$

$\angle{\color{purple}{4}}$

$\angle{\color{green}{5}}$

$\angle{\color{limegreen}{6}}$

$\angle{\color{pink}{7}}$

$\angle{\color{brown}{8}}$