Question 1192265


two angles are said to be supplementary angles if they add up to {{{180}}} degrees

{{{A+B= 180}}}°

 if < {{{A}}} is  {{{20}}} more than {{{thrice}}} the measure of the  <{{{B}}} , than we have

< {{{A=3B+20}}}

then

{{{A+B= 180}}}°.............substitute {{{A}}}

{{{3B+20+B= 180}}}°

{{{4B= 180-20}}}°

{{{4B= 160}}}°

{{{B= 40}}}°


then

< {{{A=3*40+20}}}°

< {{{A=140}}}°