Question 1127026
Supplementary angles are two angles that have a sum of {{{180}}}°.

if one angle is {{{alpha}}}, its supplement is {{{180-alpha}}}

if  {{{alpha}}} is {{{144.2}}} degrees less than its supplement, we have

 {{{alpha+144.2=180-alpha}}}

{{{alpha+alpha=180-144.2}}}

{{{2alpha=35.8}}}

{{{alpha=35.8/2}}}

{{{alpha=17.9}}}°

and its supplement is:{{{180-alpha=180-17.9=162.1}}}°